an armed conflict between the United States of America and the United Mexican States (Mexico) from 1846 to 1848. It followed in the wake of the 1845 American annexation of the independent Republic of Texas, which Mexico still considered its northeastern province and a part of its territory. (jan 2, 1848 – oct 31, 1854)
Description:
https://en.wikipedia.org/wiki/Mexican%E2%80%93American_WarAdded to timeline:
Date:
jan 2, 1848
oct 31, 1854
~ 6 years and 9 months