1. In 1777, British troops landed at Danbury, Connecticut, as part of a campaign to destroy weapons and supplies being produced in the area. The subsequent Battle of Ridgefield left British General William Tryon injured and forced the British troops to abandon their mission.

2. On April 13, 1861, tensions between the North and the South erupted into full-scale war with the fall of Fort Sumter. The fort, located in Charleston Harbor, was bombarded by Confederate forces for over 30 hours until Union Major Robert Anderson surrendered.

3. In 1923, Yankee Stadium opened its doors for the first time. The stadium, which was nicknamed "The House that Ruth Built" after legendary player Babe Ruth, hosted the Yankees until it was replaced by a newer stadium in 2008.

4. April 13, 1949, marked the opening of the United Nations headquarters in New York City. The headquarters, located in the Turtle Bay neighborhood of Manhattan, houses the primary offices of the UN and serves as a symbol of global cooperation.

5. On this day in 1970, the Apollo 13 spacecraft experienced a serious malfunction while en route to the moon. The mission was close to being aborted, but the heroic efforts of NASA and the crew allowed them to safely return to Earth. The story was later made into a film, "Apollo 13," starring Tom Hanks.