1. On March 16, 1868, the first impeachment trial of a governor in the United States took place in Arkansas. Governor Andrew Johnson, who had been accused of violating the state's constitution and abusing his power, was impeached by the Arkansas House of Representatives and later acquitted in the state Senate.

2. The first public school in Little Rock, Arkansas, was established on March 16, 1853. Known as the Little Rock Male and Female Academy, the school provided education for students of all ages and was one of the few schools in the city that admitted African American students.

3. On March 16, 1920, the Arkansas state legislature ratified the 19th Amendment to the U.S. Constitution, granting women the right to vote. Arkansas was the 12th state to ratify the amendment, which became law on August 18, 1920, after being ratified by the required number of states.

4. The first meeting of the Little Rock School Board was held on March 16, 1869. The board was responsible for establishing and managing public schools in the city, and its members were appointed by the mayor and city council.

5. The Rose Law Firm, one of the oldest and most prestigious law firms in Arkansas, was founded on March 16, 1820. The firm has represented clients in high-profile cases, including the Whitewater scandal involving former President Bill Clinton, who was a client of the firm's former partner Hillary Clinton.