1. Nebraska became a state: On March 1, 1867, President Andrew Johnson signed a bill admitting Nebraska as the 37th state of the United States. However, it wasn't until March 22, 1867, that Nebraska officially took its place among the states.

2. Nebraska women win the right to vote: On March 22, 1882, Nebraska Governor Albinus Nance signed a bill granting women the right to vote in municipal elections, making Nebraska the second state in the country to do so. Women were not granted full voting rights until the 19th Amendment was ratified in 1920.

3. Nebraska governor convicted of impeachment: On March 22, 1871, Nebraska Governor David Butler was convicted of impeachment charges related to financial misconduct, official misconduct, and gross neglect of duty. He was removed from office and barred from holding public office in the state.

4. Nebraska National Guard activated for Vietnam War: On March 22, 1968, Nebraska Governor Norbert Tiemann activated the Nebraska National Guard to support the war effort in Vietnam. The guardsmen were called up to provide security for various installations and infrastructure throughout the country.

5. Nebraska’s first Earth Day: On March 22, 1970, Nebraska held its first Earth Day celebration, an event that would become an annual tradition. The celebration aimed to raise awareness about environmental issues and inspire people to take action to protect the planet.