In 1848, which two countries signed a treaty that added the land that would become the states of arizona, california, nevada, new mexico, texas, utah, and western colorado?

answer: what was the us involvement in ww1? although the u.s. tried to remain neutral when ww1 broke out, it finally joined on april 6, 1917 after declaring war on germany. the reason for america to become involved in ww1 was germany's unrestricted submarine warfare, which had already sunk several american merchant ships.

explanation:

this isn't a question and if you're going to list things be kind and use commas.