It was the constitution because they wanted to establish a better government.
Though Indians helped colonial settlers survive in the New World, helped Americans gain their independence and ceded vast amounts of land and resources to pioneers, tens of thousands of Indian and non-Indian lives were lost to war, disease and famine, and the Indian way of life was almost completely destroyed. PLEASE MARK ME BRAINLIEST
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.
