What countries battled each other on the "Eastern Front."

Germany and Austria/Hungary
Germany and Russia

Russia and Britain
France and Germany

germany and russia

Explanation:

The war was fought between Nazi Germany, its allies and Finland, against the Soviet Union and its allies. The conflict began on 22 June 1941 with the Operation Barbarossa offensive, when Axis forces crossed the borders described in the German–Soviet Nonaggression Pact, thereby invading the Soviet Union.

were at first enthusiastic in support of the revolution. however, over time divisions of opinion became apparent between federalists and anti-federalists

the answer is a) the proclamation of 1763.