1. June 21, 1598: Juan de Oñate Founding Documents - On this day, Juan de Oñate, a conquistador, arrived in what is now New Mexico and officially claimed it in the name of King Philip II of Spain. He signed founding documents at the river north of present-day El Paso, Texas.

2. June 21, 1680: Pueblo Revolt Begins - This date marks the beginning of the Pueblo Revolt, which is considered by some to be the most successful Native American uprising in North American history. The Pueblo people, led by Popé, rebelled against the Spanish colonization of their land and drove them out of New Mexico.

3. June 21, 1905: New Mexico Becomes a State - This day marks the enactment of the New Mexico Constitution, which was approved by Congress in 1910, and New Mexico officially became a state on January 6, 1912.

4. June 21, 1914: The First Flight Across New Mexico - Two Army pilots, Lt. David King and Lt. H. H. Arnold, made the first flight across New Mexico in a Wright "B" military biplane.

5. June 21, 1971: Carlsbad Caverns National Park - This date marks the 50th anniversary of the establishment of Carlsbad Caverns National Park. This park is home to over 119 caves, including the famous Carlsbad Cavern, and covers over 73 square miles of southeastern New Mexico's desert and Guadalupe Mountains.