1. Missouri became the 24th state in the United States on July 1, 1821. The Missouri Compromise paved the way for Missouri's entry into the Union as a slave state, while Maine was admitted as a free state to maintain the balance of free and slave states in the country.

2. Harry S. Truman, the 33rd President of the United States, was born in Lamar, Missouri on July 1, 1884. Truman served as President from 1945-1953, leading the country through the end of World War II, the beginning of the Cold War, and the Korean War.

3. The Great Flood of 1993, one of the most devastating floods in Missouri's history, began on July 1, 1993. Heavy rain fell in the upper Midwestern United States, causing the Missouri and Mississippi rivers to overflow their banks and causing widespread damage and loss of life.

4. On July 1, 1917, the East St. Louis Riots broke out, resulting in the deaths of at least 39 people and the destruction of some 300 buildings. The riots were sparked by tensions between white and black workers during World War I and led to increased racial segregation and tensions in the city.

5. The Ozark Trail Association was established on July 1, 1924, to build a system of trails throughout the Ozark Mountains in Missouri. The association worked to preserve the natural beauty of the Ozarks while providing opportunities for hiking, camping, and outdoor recreation for Missourians and visitors to the state. Today, the Ozark Trail spans over 500 miles and is one of Missouri's most popular outdoor destinations.