Here are 5 interesting facts about April 18 in Maryland history:

1. In 1949, the Maryland Terrapins men's basketball team won their first national championship by defeating Oklahoma State in the finals. The championship game was played on April 18.

2. On April 18, 2013, the Maryland General Assembly passed a bill legalizing same-sex marriage in the state, making it the 8th state in the US to do so.

3. The Great Fire of Baltimore began on April 18, 1904, and burned for two days, destroying over 1,500 buildings and causing over $100 million in damages. The fire was one of the largest urban fires in American history.

4. The Baltimore and Ohio Railroad was officially incorporated on April 18, 1827, making it the first railroad company in the United States. The B&O Railroad played a major role in the transportation industry and helped to spur economic growth in Maryland.

5. On April 18, 1783, the Maryland General Assembly ratified the Treaty of Paris, officially ending the American Revolutionary War. The treaty recognized the independence of the United States and established the boundaries of the new nation.