Complex sentence: Delaware was one of the 13 colonies participating in the American Revolution and on December 7,1787, became the first state to ratify the Constitution of the United States, thereby becoming known as "The First State".
Split into simpler sentences: Delaware was one of the 13 colonies participating in the American Revolution. In December 7,1787, Delaware became the first state to ratify the Constitution of the United States, thereby becoming known as "The First State".