What were some of Mr. Gatsby's accomplishments?
Jay Gatsby accomplished a reinvention of himself. Growing up as Jimmy Gatz in rural poverty in the Midwest, he realized his prospects were dim if he stayed near his unsuccessful parents on their farm. By combining his restlessness, ambition, and some lucky breaks, he was able to make the connections he needed to change the trajectory of his life. He found success in the Army, showing himself to be a courageous leader and earning medals.
Though he used criminal means to make his fortune, Gatsby achieved the material success he knew he needed to win Daisy. In contrast to "old money" types like Tom Buchanan, Jay Gatsby earned his fortune and had material possessions and personal wealth on par with the upper classes he hoped to join.