Answer:
They signed a famous non-aggression pact, known as Ribbentrop-Molotov pact according to which they obliged themselves not to attack each other. The second part was related to division of Poland between two states.
Step-by-step explanation:
Signed of August 23rd, 1939 it was an agreement that amazed whole world.
No one expected this to happen, but just a week later something even more strange happened when Germany attacked Poland.
Agreement was singed on a period of ten years.