Swedish invasion – Occupation of the Margraviate (25 December 1674 – April 1675)

On 15/25 December 1674 Swedish troops marched through Pasewalk and invaded the Uckermark without a formal declaration of war. In fact, according to a message from the Swedish field marshal, Carl Gustav Wrangel, to the Brandenburg envoy, Dubislav von Hagen, on 20/30 December 1674, the Swedish Army would leave the Mark of Brandenburg as soon as Brandenburg ended its state of war with France. A complete break of relations between Sweden and Brandenburg was not intended however.^[9]

Figures relating the initial strength of this army, almost half of which was to consist of Germans by spring, vary in the sources between 13,000^[10] and 13,700 men and 15 guns.^[5]

To support Field Marshal Carl Gustav Wrangel, who was over 60 years old, often bedridden and suffering from gout, field marshals Simon Grundel-Helmfelt and Otto Wilhelm von Königsmarck were appointed alongside him. However, this unclear assignment prevented, inter alia, clear orders being issued, so that directions for the movement of the army were only put into effect very slowly.^[11]

The entry of Sweden into the war attracted the general attention of European powers. The military glory of the Thirty Years' War had made the military power of Sweden seem overpowering in the eyes of her contemporaries. German mercenaries willingly offered their services to the Swedes. Some German states (Bavaria, the Electorate of Saxony, Hanover, and the Bishopric of Münster) agreed to join the Swedish–French alliance.^[12]

The Swedish Army established its headquarters at Prenzlau. It was joined there another department, established in Swedish Bremen-Verden, under General Dalwig.

At the same time, after the defeat of imperial Brandenburg in the Battle of Turckheim against the French on 26 December 1674, Brandenburg's main army marched to its winter quarters in and around Schweinfurt, reaching the area on 31 January 1675.^[13] Because of wintry weather and the losses he had suffered, the Elector decided that he would not deploy his main army immediately on a new campaign in the Uckermark.^[14] In addition, a sudden withdrawal from the western theatre of war would have alarmed Brandenburg-Prussia's allies – thus achieving the ultimate goal of the Swedish invasion, i.e. to force Brandenburg to withdraw from the war with France.

Without further reinforcements the open regions of the Neumark east of the Oder and Farther Pomerania could not be held by Brandenburg, except at a few fortified locations. The Mittelmark, by contrast, could be held with relatively few troops, because to the north there were only a few easily defended passes, near Oranienburg, Kremmen, Fehrbellin and Friesack, through the marshlands of the Havelland Luch and the Rhinluch. In the east, the March was covered by the river course of the Oder. The few available Brandenburg soldiers were recalled to fortified locations. In this way, as a result of the prevailing circumstances, Brandenburg's defences were formed along the line from Köpenick, via Berlin, Spandau, Oranienburg, Kremmen, Fehrbellin and Havelberg to the River Elbe. In addition the garrison of Spandau Fortress was reinforced from 250 to 800 men; it also had 24 cannon of varying calibres. In Berlin the garrison was increased to 5,000 men, including the Leibdragoner ("dragoon bodyguard") dispatched by the Elector from Franconia and the reinforcements sent from the province of Westphalia at the end of January.

The Swedes, however, remained inactive and failed to take advantage of the absence of the Brandenburg army and occupy wide areas of the Margraviate of Brandenburg. They focused first – whilst maintaining strict discipline – on the levying of war contributions and on building up the army. This inaction was partially due to the internal political conflict between the old and the new government of Sweden, which prevented clear military aims being set. Contradictory orders were issued; command was soon followed by counter-command.

At the end of January 1675, Carl Gustav Wrangel assembled his forces near Prenzlau and, on 4 February, crossed the Oder with his main body heading for Pomerania and Neumark. Swedish troops occupied Stargard in Pommern, Landsberg, Neustettin, Kossen, and Züllichau in order to recruit there as well. Farther Pomerania was occupied as far as Lauenburg and several smaller places. Then Wrangel settled the Swedish army into winter quarters in Pomerania and the Neumark.

When it became clear in the early spring that Brandenburg-Prussia would not withdraw from the war, the Swedish court in Stockholm issued the order for a stricter regime of occupation to be enforced in order to raise pressure on the Elector to pull out of the war. This change in Swedish occupation policy followed swiftly, with the result that repression of the state and the civilian population increased sharply. Several contemporary chroniclers described these excesses as worse, both in extent and brutality, than during the Thirty Years' War.^[2] There was no significant fighting, however, until spring 1675. The Statthalter of the March of Brandenburg, John George II of Anhalt-Dessau, described this state of limbo in a letter to the Elector on 24 March/3 April 1675 as "neither peace nor war".^[15]

Swedish spring campaign (early May 1675 – 25 June 1675)

The French envoy in Stockholm demanded on 20/30 March that the Swedish Army extend its occupation to Silesia and conduct itself in agreement with French plans. The French position changed, however, in the weeks that followed and gave the Swedes more leeway in decision making in this theatre. However the envoy in Stockholm expressed concern due to the alleged failure of the Swedish troops.^[16]

In early May 1675 the Swedes began the spring campaign that had been strongly urged by the French. They had been recruiting soldiers, but suffered losses due to disease and desertion. One infantry regiment (1,100 men) and eight companies of horse had also been relocated elsewhere. The total army number available for the upcoming campaign had thus shrunk to between 11,000 and 12,000 men, by 10 May.^[17]

Wrangel's goal was to cross the Elbe to link up with Swedish forces in Bremen-Verden and the 13,000 strong army of their ally, John Frederick, Duke of Brunswick and Lunenburg, in order to cut the approach route of the Elector and his army into Brandenburg.^[18] The Swedish army entered the Uckermark, passing through Stettin; although the capability of it was not comparable to that of earlier times, the former view of Sweden's military might remained. This led, not least, to rapid early success. The first fighting took place in the region of Löcknitz where, on 5/15 May 1675, the fortified castle held by a 180-man garrison under Colonel Götz was surrendered after a day's shelling to the Swedish Army under the command of Oberwachtmeister Jobst Sigismund, in return for free passage to Oderburg. As a result, Götz was later sentenced to death by a court martial and executed on 24 March 1676.^[19]

Following the capture of Löcknitz, the Swedes pushed rapidly south and occupied Neustadt, Wriezen and Bernau. Their next objective was the Rhinluch, which was only passable in a few places. These had been occupied by Brandenburg with militia (Landjäger), armed farmers and heath rangers (Heidereitern) as a precaution. The governor (Statthalter) sent troops from Berlin and six cannon as reinforcements under the command of Major General von Sommerfeld in order to be able to mount a coordinated defence of the passes at Oranienburg, Kremmen and Fehrbellin.

The Swedes advanced on the Rhin line in three columns: the first, under General Stahl, against Oranienburg; the second, under General Dalwig, against Kremmen; and the third, which at 2,000 men was the strongest, under General Groothausen, against Fehrbellin. There was heavy fighting for the river crossing for several days in front of Fehrbellin. Because the Swedes did not succeed in breaking through here, the column diverted to Oranienburg, where, thanks to advice from local farmers, a crossing had been found which enabled about 2,000 Swedes to press on to the south. As a consequence, the positions on either side at Kremmen, Oranienburg and Fehrbellin had to be abandoned by Brandenburg.

Shortly thereafter, the Swedes mounted an unsuccessful storming of Spandau Fortress. The whole Havelland was now occupied by the Swedes, whose headquarters was initially established in the town of Brandenburg. After the capture of Havelberg the Swedish HQ was moved to Rheinsberg on 8/18 June.

Field Marshal Carl Gustav Wrangel, who left Stettin on 26 May/6 June to follow the army, only made it as far Neubrandenburg, because a severe attack of gout left him bedridden for 10 days. Overall command was devolved to Lieutenant General Wolmar Wrangel. To make matters worse, disunity broke out amongst the generals, resulting in general discipline in the army being lost and serious plundering and other abuses by the soldiery against the civil population took place.^[16] So that the troops could continue to be supplied with the necessary food and provision, their quarters were widely separated. As a result of this interruption the Swedes lost two valuable weeks in crossing the Elbe.

Sick and borne on a sedan chair, Field Marshal Carl Gustav Wrangel finally reached Neuruppin on 9/19 June. He immediately banned all looting and ordered reconnaissance detachments to be sent towards Magdeburg. On 11/21 June, he set out with a regiment of infantry and two cavalry regiments (1,500 horse) for Havelberg, which he reached the following day in order to occupy the Altmark that summer. To that end, he had all available craft assembled on the River Havel in order to construct a pontoon bridge across the Elbe.

At the same time he gave orders to his stepbrother, Lieutenant General Wolmar Wrangel, to bring up the main army and advance with him over the bridge at Rathenow towards Havelberg.^[20] Lieutenant General Wrangel, commander-in-chief of the main body, was at this time in the city of Brandenburg an der Havel. The communication link between Havelberg and Brandenburg an der Havel was held by just one regiment at Rathenow. This flank, secured only by a small force, offered a good point of attack for an enemy advancing from the west. At this time, on 21 June, a majority of the March of Brandenburg was in Swedish hands. However, the planned Swedish crossing of the Elbe at Havelberg on 27 June never came to fruition.

In the meantime, Elector of Brandenburg Frederick William tried to secure allies, knowing full well that the national forces at his disposal were, on their own, not sufficient for a campaign against the military might of Sweden. For this purpose, he went on 9 March for talks at The Hague, which he reached on 3 May.^[14] The negotiations and necessary appointments with the friendly powers gathered there lasted until 20 May. As a result, Holland and Spain declared war on Sweden at the urging of the Elector. Apart from that, he received no concrete assistance from the Holy Roman Empire or Denmark, whereupon the Elector decided to retake the March of Brandenburg from the Swedes without assistance. On 6 June 1675 he held a military parade and had the army break camp from its quarters on the River Main. The advance of the 15,000 strong army to Magdeburg was undertaken in three columns.

Campaign by Elector Frederick William (23–29 June 1675)

Map of the campaign by Elector Frederick William (23 – 29 June)

On 21 June the Brandenburg army reached Magdeburg. As a result of inadequate reconnaissance the arrival of Brandenburg appeared not to have been noticed by the Swedes, and so Frederick William adopted security measures to protect this tactical advantage. Not until he reached Magdeburg did he receive accurate information about the local situation. From intercepted letters, it appeared that Swedish and Hanoverian troops were about to join forces and attack the fortress of Magdeburg. After holding a military council, the Elector decided to break through the line of the Havel that the Swedes had now reached at their weakest point, at Rathenow. His intent was to separate the two parts of the Swedish army at Havelberg and the city of Brandenburg from one another.

On the morning of 23 June, around 3 a.m., the army set out from Magdeburg. Since the success of the plan depended on the element of surprise, the Elector advanced only with his cavalry, which consisted of 5,000 troopers in 30 squadrons and 600 dragoons. In addition there were 1,350 musketeers who were transported on wagons to ensure their mobility. The artillery comprised 14 guns of various calibres.^[21] This army was led by the Elector and the already 69-year-old Field Marshal Georg von Derfflinger. The cavalry was under the command of General of Cavalry Frederick, Landgrave of Hesse-Homburg, Lieutenant General of Görztke and Major General Lüdeke. The infantry was commanded by two major-generals, von Götze and von Pöllnitz.

On 25 June 1675 the Brandenburg army reached Rathenow. Under the personal guidance of Brandenburg's Field Marshal Georg von Derfflinger, they succeeded in defeating the Swedish garrison consisting of six companies of dragoons in bloody street fighting.

That same day the Swedish main army marched from Brandenburg an der Havel to Havelberg, where the crossing of the Elbe was to take place. But the overall strategic situation had changed dramatically because of the recapture of this important position. The ensuing separation of the two Swedish armies, who were caught entirely by surprise, meant that a crossing of the Elbe at Havelber was no longer possible. Field Marshal Carl Gustav Wrangel, who was in Havelberg at an undefended location and without supplies, now gave the main Swedish army under Wolmar Wrangel the command to join him via Fehrbellin. So in order to unite his troops with the main army Field Marshal Carl Gustav Wrangel left for Neustadt on 16/26 June.

The Swedish headquarters appears to have been completely unaware of the actual location and the strength of the Brandenburg army. Lieutenant General Wolmar Wrangel now retired rapidly north to secure his lines of communication and, as ordered, to unite with the now separated Swedish advance guard. The location of Sweden at the fall of Rathenow on 25 June/5 July was Pritzerbe. From here there were only 2 exit routes because of the peculiar natural features in the March of Brandenburg at that time. The shorter passage was, however, threatened by the Brandenburg troops and the road conditions were considered to be extremely difficult. So the Swedes decided to use the route via Nauen, where they could branch out from a) Fehrbellin to Neuruppin, b) Kremmen to Gransee and c) Oranienburg to Prenzlau.

However, since both Oranienburg and Kremmen appeared to the Swedes to be occupied by the enemy, the only option open to them was to retreat via Nauen to Fehrbellin. Early on, the Swedish general sent an advance party of 160 cavalry to secure the passage of Fehrbellin.

The Elector immediately divided his force into three to block the only three passes. The first division under Lieutenant Colonel Hennig was dispatched to Fehrbellin, the second under Adjutant General Kunowski was sent to Kremmen, the third under the command of Captain (Rittmeister) Zabelitz was deployed to Oranienburg. They had the task, with the help of expert local hunters, of getting to the exits to the Havelland Luch swamps ahead of the Swedes, using little known routes through rough terrain. There, the bridges were to be destroyed and the roads made impassable. For this purpose, these exits were to be defended by an armed militia group and by hunters.

Details are only available for the first troop of Lieutenant Colonel Hennig's division. This sub-unit of 100 cuirassiers and 20 dragoons, guided by an experienced local forester, rode through the Rhinfurt at Landin and thence to Fehrbellin. Once there, taking advantage of the element of surprise, they attacked the contingent of 160 Swedish cuirassiers manning the fieldworks guarding the causeway. In this battle, about 50 Swedes were killed^[22] A captain, a lieutenant and eight soldiers were captured, the rest escaping with their commander, Lieutenant Colonel Tropp, leaving their horses behind. Brandenburg lost 10 troopers. The Brandenburg soldiers then set fire to the two Rhin bridges on the causeway. Then the causeway itself was also breached in order to cut off the Swedes' avenue of retreat to the north.

Schematic illustration of the Battle of Fehrbellin on 28 June 1675 – showing the terrain features

Illustration of the heights occupied by Brandenburg artillery. In the middle of the painting is Elector Frederick William on a stallion. Painting by Dismar Degen, 1740

Since no order was issued to hold the pass at all costs because of its importance for the possible withdrawal of Swedish troops, the Brandenburg division attempted to rejoin the main army. On the afternoon of 17/27 June (after the actual battle at Nauen) they arrived back with the main body. The reports by this and the two other divisions reinforced the Elector's view to fight a decisive battle against the Swedes.

On 27 June the first battle between the Swedish rearguard and Brandenburg vanguard took place: the Battle of Nauen, which ended with the recapture of the town. By evening, the two main armies were drawn up opposite one another in battle formation. However, the Swedish position appeared too strong for a successful attack by Brandenburg and the Brandenburg troops were exhausted by having to undertake forced marches in the days beforehand. So the Elector's orders were to withdraw into or behind the town of Nauen and make camp there. On the Brandenburg side the expectation was that they would begin engaging the next morning at the gates of Nauen in the decisive battle. The Swedes, however, took advantage of the cover of night to retreat towards Fehrbellin. From the beginning of their withdrawal on 25 June until after the battle at Nauen on 27 June, the Swedes lost a total of about 600 men during their retreat and another 600 were taken prisoner.^[23]

As the causeway and the bridge over the Rhin had been destroyed the day before by the Brandenburg raid, Sweden was forced to participate in the what would be the Battle of Fehrbellin.^[24] Lieutenant General Wolmar Wrangel had at most 7,000 men and seven cannon at his disposal,^[25] the rest was with his stepbrother near Kyritz.^[26]

The Swedes were defeated, but succeeded under cover of night to cross the repaired bridge. Their losses amounted to 600 killed and wounded in the battle, compared to Brandenburg's 500.^[27] The Swedes destroyed the bridge behind them, preventing Frederick's army from effectively pursuing.^[26] The retreat continued through the Prignitz and Mecklenburg.^[28] The Brandenburg cavalry caught up with the Swedish rearguard at Haberhof, but was repulsed. Another attempt was made near Wittstock, where the Brandenburg cavalry was once again thrown back with the loss of their major-general von Götze. After this, they called off the pursuit.^[26] Many Swedish soldiers deserted during the hasty retreat.^[29]