1. On May 14, 1804, the Lewis and Clark Expedition set out from St. Louis on their journey to explore and map the western portion of the United States. The expedition would last over two years and cover over 8,000 miles.

2. On May 14, 1856, a major tornado struck the city of St. Louis, causing significant damage and loss of life. Over 300 people were killed and many buildings were destroyed or severely damaged.

3. May 14, 1904, marked the beginning of the Louisiana Purchase Exposition, also known as the St. Louis World's Fair, which was held to commemorate the 100th anniversary of the Louisiana Purchase. The fair featured over 1,500 exhibits from around the world and attracted over 19 million visitors.

4. On May 14, 1927, Charles Lindbergh departed from Lambert Field in St. Louis on his historic solo flight across the Atlantic Ocean. The flight, which took over 33 hours, made Lindbergh a national hero and helped to advance the development of aviation technology.

5. May 14, 1984, saw the dedication of the Gateway Arch Park in St. Louis, which included the completion of a major renovation of the Gateway Arch and the surrounding area. The park attracts millions of visitors each year and has become a symbol of the city's history and culture.