who is this person?
He was the 12th president of the United States.
Zachary Taylor
Zachary Taylor (November 24, 1784 – July 9, 1850) was the 12th president of the United States, serving from March 1849 until his death in July 1850. 
what military hero from the mexican war became potus Zachary Taylor.
wiki:16925764
Zachary Taylor [SEP] Introduction
Zachary Taylor (November 24, 1784 – July 9, 1850) was the 12th president of the United States, serving from March 1849 until his death in July 1850. Taylor previously was a career officer in the United States Army, rose to the rank of major general and became a national hero as a result of his victories in the Mexican–American War. As a result, he won election to the White House despite his vague political beliefs. His top priority as president was preserving the Union. He died sixteen months into his term. He made no progress on the most divisive issue in Congress, slavery.