1. On August 27, 1635, the first recorded instance of a colonial expedition in Maryland occurred when Governor Leonard Calvert led a group of English settlers to meet with the Piscataway tribe. The expedition was successful in establishing peaceful relations and trading opportunities with the native people.

2. In 1776, a resolution was passed by the Maryland Convention on August 27, voting to approve the Declaration of Independence. This made Maryland the seventh state to ratify the document, helping to lead the way towards American independence from British rule.

3. On August 27, 1814, during the War of 1812, British forces marched into Washington D.C. and burned several public buildings, including the White House and the Capitol. This event became known as the Burning of Washington, and had lasting impacts on the city's history and architecture.

4. In 1835, the first railroad in Maryland opened on August 27, running between Baltimore and Elliott's Mills. This marked a significant advancement in transportation and commerce for the state, making it easier to transport goods and people across longer distances.

5. On August 27, 1857, Charles Joseph Bonaparte was born in Baltimore, Maryland. Bonaparte was a lawyer and politician who served as the U.S. Attorney General under President Theodore Roosevelt, helping to establish the modern Department of Justice. He was also the founder of the American Bar Association.