"Master George" refers to George Washington, the first President of the United States. He played a crucial role in the American Revolutionary War as the commander of the Continental Army. Washington is often called the "Father of His Country" for his leadership in establishing the nation. In addition to his military achievements, Washington presided over the Constitutional Convention in 1787, which led to the creation of the U.S. Constitution. He served two terms as president from 1789 to 1797 and set many precedents for the office, including the tradition of a peaceful transfer of power.