ORDER OF BATTLE // May 1, 1918
Battle of Lahti
Estimated force strength by side, with confidence labels per surviving record.
Forces engaged
2 sides catalogued · combined 13,000 estimated
German Empire
3,000
Medium-confidence figure
Finnish Reds
10,000
Medium-confidence figure
Battle context
The Battle of Lahti, fought from 19 April to 1 May 1918, was one of the two final major engagements of the Finnish Civil War, the other being the contemporaneous Battle of Viipuri. German forces numbering approximately 3,000, fighting alongside Finnish White forces, faced a Red force of roughly 10,000. The engagement ended in a decisive collapse of the Red side: casualties among the Finnish Reds reached 30,000, a figure that encompasses killed, captured, and surrendered personnel and reflects the scale of the defeat. Together with the fall of Viipuri at the end of April, the battle at Lahti effectively ended organized Red resistance, concluding the civil war in favor of the White and German coalition.
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