During the First World War, he commanded in 1916–1918 the Bulgarian First Army on the Salonika front.

Dimitar Geshov was born on September 14, 1860, in Ziştovi (Svishtov), then part of Turkey.

In the Serbo-Bulgarian War (1885), he was a company commander and participated in the battles at Breznik and Pirot.

He distinguished himself at Krivolak, on June 22, 1913, and was promoted to major general.

With his army, he repelled in 1917 several allied attacks, at Monastir, Doiran and the Cerna Bend.