1. Homestead Act of 1862: On June 6, 1862, President Abraham Lincoln signed the Homestead Act into law, offering 160 acres of public land to anyone who would live on and improve the land for at least five years. This act played a significant role in the settlement of Nebraska and other western states.

2. Kearney Airfield: On June 6, 1942, the United States Army Air Corps opened Kearney Airfield in Kearney, Nebraska. The airfield served as a training base for bomber crews during World War II and played a critical role in the Allied victory.

3. First Issue of the Omaha World-Herald: On June 6, 1885, the first issue of the Omaha World-Herald was published in Omaha, Nebraska. The newspaper has been in continuous operation ever since and is now the largest newspaper in the state.

4. Arbor Day Becomes a State Holiday: On June 6, 1872, Nebraska became the first state in the United States to make Arbor Day a state holiday. J. Sterling Morton, a Nebraska resident, and Secretary of Agriculture under President Grover Cleveland, is credited with originating the idea of Arbor Day.

5. Chimney Rock Designated a National Historic Site: On June 6, 1956, Chimney Rock, a natural rock formation in western Nebraska that was a landmark for pioneers traveling the Oregon Trail, was designated a National Historic Site by the National Park Service. Chimney Rock is now a popular tourist attraction and a symbol of the pioneer spirit that helped settle the West.