What was a decisive factor in the German defeat at the Battle of
Stalingrad?

The Battle of Stalingrad, fought by the Soviet Union and German forces, was a decisive victory for the USSR that turned the tide of war in the Allies favor. Germany's defeat at Stalingrad was not only a catastrophic German loss but put Germany on the defensive for the rest of the war.

Explanation:

what are the others?

bismarck believed in using force

is the correct answer!