Answer :
Manifest destiny is the spread of westernization, Americans want to gain more land in the east coast. This eventually led to the Mexican war because Mexico owned some of the land the Americans were settling in such as California.
Answer:
By the end of the war, Mexico would lose almost half its territory to the U.S., including lands from Texas to California. The war was a key event in American History as it fulfilled its 'manifest destiny', encompassing land from the Atlantic Ocean to the Pacific.
Explanation: