Final answer:
Santa Anna, Kearney, Fremont, Taylor, and Scott played important roles in the Mexican War.
Step-by-step explanation:
In the Mexican War, Santa Anna, Stephen W. Kearney, John C. Fremont, Zachary Taylor, and Winfield Scott played significant roles.
Santa Anna, a Mexican general and politician, led Mexican troops into Texas in 1836 and returned as President during the war. Kearney, a US Army officer, led a campaign to capture New Mexico and California. Fremont, also a US Army officer, led expeditions in California and played a key role in its annexation. Taylor, a US General, led the Army of the Center and captured northern Mexico. Scott, another US General, led the Army of Occupation and captured Mexico City, playing a crucial role in the US victory.