Ribbentrop-Molotov Pact influence on WWII

23 August 1939 Ribbentrop made his historic flight to Moscow to negotiate the final shape of German-Soviet Pact. After  solving same differences regarding Baltic States, the Pact was signed.

1.The pact sealed Hitler decision to attack Poland thus effectively starting WWII

2.It was done at the time of bitter fighting between Japan and Soviet forces at Khalkhin Gol and for Japan it was a betrayal of Anti-Comintern pact. It helped  ""Go south" fraction in Japanese military to strengthen their position which at the end  led to Pearl Harbour debacle and release soviet reserve for Stalin "Moscow Offensive".

3.After WWII,  The western border of Soviet Union follow the Ribbentrop-Molotov demarcation line thus de facto was endorsed by Western Allied Countries. It shaped Central European political geography for 50 years and remain in force until fall of Soviet Union.