* U.S. Military Academy at West Point (1839-1843): Grant was appointed to West Point by his congressman, but his academic record was mediocre, and he struggled with subjects like mathematics. He graduated 21st in his class of 39, a rank that reflected his lack of academic interest and his preference for practical skills over theoretical knowledge.
* The Mexican-American War (1846-1848): Grant served as a lieutenant in the 4th U.S. Infantry Regiment during the war. He saw action in various battles, including the Siege of Veracruz and the Battle of Chapultepec, gaining valuable experience in combat. However, his performance was not particularly noteworthy, and he faced criticism for his handling of troops in some instances.
* Post-War Service: After the Mexican-American War, Grant served in various posts, including the Quartermaster Department and the Pacific Coast. These experiences further broadened his understanding of military logistics and administration.
* Civil War: Grant's real military education came during the American Civil War. He quickly rose through the ranks, proving to be a capable and effective leader in the field. His victories at Vicksburg and Chattanooga established him as a military genius and earned him the trust of President Lincoln.
Grant's lack of formal military education was seen as a weakness by some, but his practical experience and his ability to learn from his mistakes proved to be invaluable assets. He was a skilled strategist, tactician, and logistician, and he possessed a deep understanding of human nature. He was also a tenacious and determined leader, willing to take risks and to fight for victory.