When Jackie Robinson stepped up to the plate for the Brooklyn Dodgers on April 15, 1947, everything changed. He was the first black man to play in a major-league baseball game in the twentieth century! His brave act opened the door for more black players to achieve their own big-league dreams. But how did Jackie break baseball's color barrier? Whether excelling at every sport he tried as a youngster or standing up for his civil rights as a soldier in the US Army, Jackie always focused on his goals. Find out how this boy who loved baseball became one of history's greatest trailblazers! Trailblazers is a biography series that celebrates the lives of amazing pioneers, past and present, from all over the world. Get inspired by more Trailblazers: What kind of trail will you blaze?