which educational institute did he attend?
Maysville Seminary , and John Rankin's academy.
Ulysses S. Grant
 Grant was a student at Maysville Seminary, and in the autumn of 1838, he attended John Rankin's academy
who's the 18th president of the united states Ulysses S. Grant. how is he associated with the mexican–american war? He took part in it as a soldier of the American army.
wiki:19682595
Ulysses S. Grant [SEP] Early life and education
In the winter of 1836–1837, Grant was a student at Maysville Seminary, and in the autumn of 1838, he attended John Rankin's academy. In his youth, Grant developed an unusual ability to ride and manage horses. Grant disliked the tannery, so his father put his ability with horses to use by giving him work driving wagon loads of supplies and transporting people. Unlike his siblings, Grant was not forced to attend church by his Methodist parents. For the rest of his life, he prayed privately and never officially joined any denomination. To others, including his own son, Grant appeared to be an agnostic.