1. On March 5, 1908, the state of Oklahoma officially adopted its state flag. The flag features a blue background with a white star in the center, surrounded by a circle of 45 smaller stars representing Oklahoma as the 46th state to join the Union.

2. In 1931, on March 5, the city of Oklahoma City experienced one of its worst natural disasters in history. A massive tornado touched down, killing at least 16 people and injuring hundreds more while causing widespread damage throughout the city.

3. On March 5, 1963, the famous country music singer Patsy Cline played her last show in Oklahoma City before tragically passing away in a plane crash the following day.

4. In 1978, a group of scientists at the University of Oklahoma successfully cloned the first mammal from an adult somatic cell. The rodent, named Cumulina, was born on March 5 of that year and marked a significant moment in the history of genetic research.

5. March 5, 1876, marked the beginning of the historic battle of Little Bighorn, which took place in what is now Montana. However, the battle had major implications for Oklahoma history, as it was connected to the larger conflicts between Native American tribes and the US government over land rights and sovereignty that would shape the state's history for years to come.