I think they had in common to develope their populations and "cities" (at their time there aren't real city like nowadays) near the rivers. Also both they had access to good fertile soils
Answer:
defending the common interests of alliance members.
Communism power became to decline!
China's increased conflict with the soviet union :)
Stutthof concentration camp
It was also the last camp liberated by the Allies on 9 May 1945. It is estimated that between 63,000 and 65,000 prisoners of Stutthof concentration camp and its subcamps died as a result of murder, starvation, epidemics, extreme labour conditions, brutal and forced evacuations, and a lack of medical attention.