The Mexican-American War
Part 3: The Coming of War
In 1844, the U.S. annexed Texas, making it an American territory.
Two years later, war began. The first major battle was at Palo Alto, in Texas, and neither side could claim victory. The Battle of Monterrey soon followed, and American forces under General Zachary Taylor seized the strategic Mexican city.
Also at this time, fighting was taking place further west. An American army occupied Los Angeles but was soon forced out. The California city of Monterey surrendered to American commodore John Sloat in 1846. In that same year, the American Army of the West, under Colonel Stephen Kearny, marched toward California. He reached Santa Fe in the summer and California in December. In January 1847, American troops reoccupied Los Angeles and kept it this time.
In Texas and Mexico in 1847, American troops enjoyed many successes: