One reason Andrew Jackson was considered a champion of the "common man" was because he

Fought in the war of 1812

Explanation:

Andrew Jackson became the 7th President of the United States. He is considered a champion of the common man because of his humble background. He became orphan at a younger age, and had no connection with wealthy aristocrats. To achieve greatness in life, he struggles as a common man like fighting for the nation and showing interest in politics.  He fought in the American Revolution and the war of 1812.

the most famous of all the units fighting in cuba, the "rough riders" was the name given to the first u.s. volunteer cavalry under the leadership of theodore roosevelt. roosevelt resigned his position as assistant secretary of the navy in may 1898 to join the volunteer cavalry. the original plan for this unit called for filling it with men from the indian territory, new mexico, arizona, and oklahoma. however, once roosevelt joined the group, it quickly became the place for a mix of troops ranging from ivy league athletes to glee-club singers to texas rangers and indians.