1. In 1951, the deadliest flood in Kansas history occurred on June 27 when the Kansas, Neosho, and Verdigris Rivers overflowed after heavy rainfall. The flood resulted in 17 deaths and forced over 5000 people to evacuate their homes.

2. On June 27, 1956, Dwight D. Eisenhower, a native of Kansas, signed the Federal-Aid Highway Act, which authorized the construction of the Interstate Highway System in the United States. This act had a significant impact on the development of the nation's transportation infrastructure and the economy.

3. In 1838, the first Native American reservation in Kansas was established by the U.S. government on June 27. The treaty created a reservation for the Potawatomi people, who had been forcibly removed from their homes in Indiana and Illinois.

4. On June 27, 1874, the famous western outlaw Jesse James and his gang robbed the Obocock Bank in Corydon, Kansas. The robbery netted the gang more than $30,000 in cash and gold coins and marked one of their earliest successful heists.

5. In 1925, the University of Kansas officially adopted the Jayhawk as its mascot on June 27. The Jayhawk, which is a mythical bird with a mix of blue and red feathers, has since become a symbol of pride for KU students and fans across the country.