Hitler approved the contract so he could overrun Poland without Russia fighting after.
In short, it allowed him to invade Poland without Soviet interference.
Good luck :)
<span>On 28 August 1963, more than 200,000 demonstrators took part in the March on Washington for Jobs and Freedom in the nation's capital. The march was successful in pressuring the administration of John F. Kennedy to initiate a strong federal civil rights bill in Congress.</span>
