Robinson's dazzling athletic prowess and grace under pressure effectively led to the integration of the Major Leagues, and his 10-year career with the Dodgers — and his outspoken activism in his later years — helped set the stage for the burgeoning civil rights movement.When he stepped onto Ebbets Field that day, he became the first Black man to play in a Major League Baseball game since 1884.
In the Treaty of Guadalupe Hidalgo it was stated that the Mexicans could retain their Mexican citizenship or they could stay and become a citizen of the United States.
