The BT-42 was used for the first time in 1943, at the Svir River, where it was used against enemy pillboxes.
About 30 percent (24,000) of the remaining Russian population were confined in camps; six-thousand of them were Soviet refugees captured while they awaited transportation over Lake Onega, and 3,000 were from the southern side of the River Svir.
During the stationary phase of the war, Aho was stationed at the Svir River with his regiment.
Construction of railways and the movement of ships along the Svir River increased competition, which led to the closure of the Tikhvin system.
His career was interrupted by World War II, during which time he served for his native Finland in the Gulf of Finland and around the Svir River.
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