Here are 5 interesting facts about April 1 in Nebraska history:

1. The First Nebraska Volunteer Infantry was organized on April 1, 1861, becoming the first regiment in the Union Army to respond to President Abraham Lincoln's call for troops after the outbreak of the Civil War. The regiment fought in several battles, including Vicksburg and Chattanooga.

2. On April 1, 1867, Nebraska officially became a state. President Andrew Johnson signed the bill that admitted Nebraska as the 37th state of the United States. The state capital was initially located in Omaha until it was moved to Lincoln in 1869.

3. The University of Nebraska-Lincoln was established on April 1, 1869, as part of the land-grant system. The university originally offered degrees in agriculture, mechanics, and military science. It has since grown to offer over 150 undergraduate majors and more than 100 graduate programs.

4. Nebraska's Arbor Day holiday was first observed on April 1, 1872, after it was proposed by J. Sterling Morton, a Nebraska resident and newspaper editor. Arbor Day is now celebrated worldwide as a day to plant trees and promote environmental conservation.

5. On April 1, 1955, the Strategic Air Command (SAC) moved its headquarters to Offutt Air Force Base in Nebraska. SAC was responsible for maintaining America's nuclear arsenal and conducting strategic bombing missions during the Cold War. Today, Offutt AFB is home to the United States Strategic Command (USSTRATCOM) which oversees America's strategic deterrence capabilities.