1. Flag Day: June 14 marks Flag Day across the United States. It is a day when Americans honor the adoption of the national flag in 1777.

2. South Dakota became a state: On June 14, 1889, South Dakota became the 40th state in the United States. Today, it is known for its stunning landscapes, including the iconic Mount Rushmore.

3. First Woman Governor: In 1993, South Dakota made history when it elected its first female governor, Christine Todd Whitman. She served two terms from 1993 to 2001.

4. Major Floods: In June 2011, South Dakota was hit by severe flooding that caused millions of dollars in damages. The flooding was caused by multiple severe storms that dumped heavy rain across the state.

5. Lakota Sioux Treaty: On June 14, 1866, the United States signed a treaty with the Lakota Sioux tribe in South Dakota. The treaty established a reservation for the Lakota Sioux and guaranteed them the right to occupy and use land within the reservation boundaries.