what the hell is Molotov Ribbentrop pact and why did it exist

Description: ??? (depending on the name given) / Wunderwaffe An ai started creating in 1936 finished and tested in 1940 This character is made by DST (or any other name people called DST) Credit to Sal, or Salunseon for making this sprite Used by DST (or any other name people called DST)