Mexican War was an armed conflict between the United States and Mexico from 1846 to 1848. It followed the 1845 U.S. annexation of Texas, which Mexico considered Mexican territory since the Mexican government did not recognize the Velasco treaty. Beyond the disputed area of Texas, U.S. forces quickly occupied the regional capital of Santa Fe de Nuevo México along the upper Rio Grande. The U.S. invasion made it to the capital Mexico City forcing peace negotiations and the war ended with Treaty of Guadalupe Hidalgo by which Mexico recognized the Mexican Cession, areas not part of disputed Texas but conquered by the U.S. Army. In Mexico, the war worsened domestic political turmoil. Since the war was fought on home ground, Mexico suffered a large loss of life of both its soldiers and its civilian population. This book provides accounts and reminiscences written by participants of the War Hon. William McKay, Colonel Daniel E. Hungerford and Colonel Charles J. Murphy.