Here are five significant events that happened on April 18 in Kansas history:

1. On April 18, 1858, the first issue of the Kansas Weekly Herald was published in Lawrence, Kansas. The newspaper achieved wide circulation and became an important source of news and political commentary in the territory.

2. On April 18, 1865, Quantrill's Raid occurred in Baldwin City, Kansas. William Quantrill and his band of Confederate guerrillas attacked the town, burning buildings and killing 8 people.

3. On April 18, 1934, the infamous shootout between law enforcement and the notorious gangsters Bonnie Parker and Clyde Barrow occurred near Dexter, Kansas. The shootout resulted in the deaths of two highway patrolmen and the capture of several members of the Barrow gang.

4. On April 18, 1955, President Dwight D. Eisenhower spoke at the dedication ceremony for the new Air Force Academy in Colorado Springs, Colorado. As a former resident of Abilene, Kansas, Eisenhower's presence was seen as a source of pride for many Kansans.

5. On April 18, 1995, the Alfred P. Murrah Federal Building in Oklahoma City, Oklahoma, was bombed by Timothy McVeigh and Terry Nichols. The attack had a significant impact on Kansas, as McVeigh and Nichols were both residents of the state and had ties to anti-government groups active in the region. The bombing killed 168 people, including 19 children, and injured over 600 others.