The European that is credited with ushering the age of exploration was Prince Henry.
Prince Henry of Portugal (1394-1460) was the most important figure that supported the Age of Exploration because he loved navigation. Indeed he was known as Prince Henry, the navigator. He was so interested in exploring that he funded a school of navigation and sponsored many expeditions to west Africa.
The Battles of Lexington and Concord were the precedent of the American Revolutionary war in 1775. It started when the British capture rebel Adams in Boston and Hancock in Lexington. It was a small tight but incredibly important. 80American military man where in town. Later word spread and everyone prepared to fight the British. They where called minutemen because they where ready to fight in any minute.