1. On March 15, 1915, New Mexico became the 47th state admitted to the United States. The state had previously been a territory of the United States for 62 years.

2. On March 15, 1824, the first American fur trapping expedition into New Mexico arrived at Santa Fe. Led by Ewing Young, the group traded with the local Spanish and Pueblo peoples for furs and horses.

3. In 1884, on March 15, the first electric streetcar line began operation in Albuquerque. The line ran for two miles and provided service from the railroad station to Old Town.

4. On March 15, 1862, the Confederate Army won the Battle of Glorieta Pass during the American Civil War. The battle took place near Santa Fe and resulted in the Union Army withdrawing from the area and abandoning their supplies.

5. March 15, 1933 marked a significant event in New Mexico history as the Cimarron River flooded after heavy rains. The flood caused extensive damage to the town of Springer and claimed the lives of at least 17 people. The disaster led to improvements in flood control measures in the region.