The Swedish infantry under Delwig lost 300–400 men alone, with 200 additional losses mostly attributed to the cavalry. All in all, the Swedes had lost about 500–600 killed, wounded and captured in the battle Wrangel lost many more in the coming days' retreat due to the pursuit of Brandenburg troops and the wrath of local peasants, some of whom still remembered the Swedes' atrocities during the Thirty Years' War. Of the 1,200 Dalwig Guards, all but 20 were killed or captured. Near Wittstock alone, some 300 Swedes and their officers were slain by peasant raiders. Raiding parties, desertion, and starvation meant that, by July 2, every last Swedish soldier in the Mark had retreated or been killed or captured. Historical significance At the day of battle, the Swedes had no intention to deliver battle beyond joining their forces and moving off, exactly what they accomplished, while the Brandenburgers intended to prevent this, which failed. Regardless the battle became a watershed moment. By established military tradition since classical antiquity, the side that controlled the battlefield at the end was the victor. That honour clearly lay with the Brandenburgers, who proceeded to announce it to the world in no uncertain terms. Upon the Brandenburgian victory, the Holy Roman Empire and Denmark finally met their obligations and declared war on Sweden. While Frederick William's forces invaded Swedish Pomerania, the Swedes did not enter the margraviate again until the 1679 Peace of Saint-Germain-en-Laye, which—to the elector's great disappointment—largely restored the status quo ante bellum. The victory at Fehrbellin had an enormous psychological impact: the Swedes, long considered unbeatable, had been bested and Brandenburg alone had prevailed against Swedish and French power politics. The victory boosted the Prince-Elector, age 56 at the time, who took an active role in the fighting, apparently having to be cut out of an encirclement by his dragoons. Frederick William henceforth was known as the "Great Elector", and the army that he and Derfflinger had led to victory eventually became the core of the future Prussian Army vital for the country's development as a European great power. Glorified in the course of rising German nationalism under the rule of the House of Hohenzollern in the 19th century, June 18 was a holiday that would be celebrated in Germany up until 1914. In Sweden, the fiasco was one of the main accusation counts against the Privy Council aristocrats at the Riksdag