Invasive species of flora and fauna and communicable diseases were a byproduct of the Colombian Exchange
the reason why is because they could have key information.
The Constitution divides powers between the federal government's branches. The Constitution creates a structure that limits the powers of our government.
If we are talking about the second world war, then then answer would be that the Chinese kept the Japanese busy fighting them, and in turn, about 800,000 of their troops. This gave the Americans, who were the main force against the Japanese during this time, a little breathing room with which to continue military operations.
Hope this answered your question.
