With whom did germany sign a non aggression pact to avoid unnecessary confrontation while marching into eastern europe

The Soviet Union

Explanation:

The Non-Aggression Pact between Germany and the Union of Soviet Socialist Republics was signed the 23 August 1939 by the Foreign Relations Ministers of both countries, Joachim von Ribbentrop and Viacheslav Molotov. It was signed 9 days before the start of WWII. The terms of the treaty included a commitment to avoid conflict between both countries and to seek peaceful solutions to controversies between them. The effects of the treaty diminished with the increase of the hostilities of Nazi Germany and finally ended 1941 when Nazi Germany decided to invade the Soviet Union.