1. On May 13, 1864, during the American Civil War, Union and Confederate forces clashed in the Battle of Resaca. This battle took place in northwestern Georgia but had significant implications for Kansas, as many Kansans were serving in Union forces and participated in the battle.

2. May 13, 1933, marks the date when the first women's track and field meet was held in Kansas. The meet was held at Washburn University in Topeka and paved the way for women's athletics in the state.

3. Kansas became the first state to adopt the 8-hour workday on May 13, 1885. This law required employers to limit the workday to eight hours for all workers, except for a few specific exemptions. This law set a precedent for worker's rights legislation in the United States.

4. On May 13, 1930, a catastrophic tornado swept through the town of Roff, in southeastern Oklahoma, killing 72 people and injuring hundreds more. Kansas played a significant role in the relief efforts, as many Kansas residents volunteered to assist in search and rescue operations and provide aid to the survivors.

5. May 13, 1865, was the day that the last Confederate Army surrendered. General Edmund Kirby Smith surrendered his forces in Galveston, Texas, effectively ending the Civil War. This marked the end of a tumultuous period for Kansas, which had been a battleground for abolitionists and pro-slavery forces just a few years before.