Janjgava served in a series of leadership roles after the war, including as Minister of Internal Affairs of Georgian SSR (1954—1958).

After graduating he entered the Red Army in 1927 and specialized in military warfare at the Transcaucasus Military-Infantry School in the capital city of Tbilisi.

[2] In 1941 when the Great Patriotic War broke out, Janjgava, who had already reached the rank of colonel, took part in various defensive operations against German forces in Moldavia and Donets Basin.

From 1944 he led the 354th Rifle Division, which was successively part of the 1st and 2nd Belorussian Fronts, and participated in the liberation of Belorussia and Poland and, more importantly, the advance through East-Prussia and finally the attack on Berlin.

For outstanding performance and personal courage, Janjgava was awarded the title Hero of the Soviet Union and received various other decorations.