What major city in the soviet union suffered under germanys blockage

The Siege of Leningrad began on the 8th of September in 1941 and ended on the 27th of January of 1944

siege of Leningrad

Explanation:

The siege of Leningrad was a prolonged military blockade undertaken from the south by the Army Group North of Nazi Germany against the Soviet city of Leningrad (now Saint Petersburg) on the Eastern Front in World War II.

a system of cooperative federalism emerged, as the powers of the federal government expanded.