1876: The first Mormon settlers reach Sunset Crossing on the Little Colorado River, where they would establish four settlements. The four companies, which include 50 men and their families, left Salt Lake City on Feb. 3, 1876, at the instruction of President Brigham Young of the Church of Jesus Christ of Latter-Day Saints.

1877: John D. Lee, who in 1872 established and operated Lee's Ferry across the Colorado River, is executed for his participation in the Mountain Meadows massacre. He was seated upon his coffin and shot by a firing squad at the site of the massacre.

1995: Kevin J. McKinley and Seamus A. Moley plead guilty in Tucson to sending 2,900 mining detonators to Ireland for the Irish Republican Army. The men are sentenced to 19 months in prison.

Want to share an important event from Tucson's history? Email it to krumore@azstarnet.com.