What devastating war did manifest destiny lead to in unites state

The United States went to war with Mexico in 1846. The war lasted for two years. By the end of the war, Mexico would lose almost half its territory to the US, 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.

answer; approx,300,000 ;

answer; ///relational devaluation;