1. Missouri Statehood Day: On November 21, 1821, Missouri officially became the country's 24th state. Missouri is known as the 'Show-Me State' and is famous for its Gateway Arch, barbecue, and the Ozark Mountains.

2. Harry S. Truman Was Born: On November 21, 1884, Harry S. Truman, 33rd President of the United States, was born in Lamar, Missouri. Truman is known for his decision to drop atomic bombs on Japan, the creation of the Marshall Plan, and the desegregation of the US military.

3. Battle of Blue Springs: On November 21, 1861, Union forces under Major General William Tecumseh Sherman defeated Confederate forces at the Battle of Blue Springs in Jackson County, Missouri. This was an important Union victory in the early days of the Civil War.

4. St. Louis Blues Win First Stanley Cup: On November 21, 2019, the St. Louis Blues won their first-ever Stanley Cup Championship, defeating the Boston Bruins in Game 7 of the Stanley Cup Finals. This was a historic moment for the Blues and their fans, who had been waiting for a championship for over 50 years.

5. Katy Trail State Park Opens: On November 21, 1990, the Katy Trail State Park officially opened in Missouri. The trail is a popular destination for hiking, biking, and horseback riding, and spans 240 miles from Clinton to St. Charles. The trail follows the former route of the Missouri-Kansas-Texas Railroad and is Missouri's longest state park.