Exploration
In the Pacific Ocean, Jorge de Menezes (c. 1498–?), discovered Papua New Guinea. García Jofre de Loaísa (1490–1526), discovered the Marshall Islands. Explorations of the Americas began with the initial discovery of America by Christopher Columbus (1451–1506), who led a Castilian (Spanish) expedition across the Atlantic, discovering America. After the discovery of America by Columbus, a number of important expeditions were sent out to explore the Western Hemisphere. This included Juan Ponce de León (1474–1521), who discovered and mapped the coast of Florida; Vasco Núñez de Balboa (c. 1475–1519), who was the first European to view the Pacific Ocean from American shores (after crossing the Isthmus of Panama) confirming that America was a separate continent from Asia; Aleixo Garcia (14?–1527), who explored the territories of present-day southern Brazil, Paraguay and Bolivia, crossing the Chaco and reaching the Andes (near Sucre).
Earth-Three
Earth-Three was introduced by Gardner Fox and Mike Sekowsky in a 1964 issue of "Justice League of America". Earth-Three's history is depicted as a mirror image to that of the Earth we know. On Earth-Three, Christopher Columbus was American and discovered Europe; England (a colony of America) won freedom in a reversed form of the Revolutionary War (with George Washington surrendering his sword to Charles Cornwallis) in 1774; President John Wilkes Booth was assassinated by actor Abraham Lincoln. Crucially, Earth-Three was home to an analogue to the Justice League, the Crime Syndicate of America.