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:

the answer is title i subtitle b

united states reinforcements contributed greatly to three allied victories in france at: cantigny (first major american battle), argonne (the largest in the united states military history, involving 1.2 million american soldiers), and château-thierry (one of the first actions under general pershing).