The correct answer is Christopher Columbus.
Christopher Columbus is the European explorer credited with being the first European explorer to encounter the Americas. In his first voyage in 1492, Columbus landed in Hispaniola (modern day Dominican Republic). This encounter lead to several other European explorers setting out to colonize these new lands as a means to gain wealth.
The Eagle, Globe, and Anchor—the most distinct of all Marine Corps marks—has a long and storied heritage as the emblem for the Marine Corps. It is the basis for the flag, the seal, the branch-of-service insignia, and many of the logos.