The Coast Guard turned the big 2-2-4 on Monday, celebrating with some guest appearances and other festivities all around the country. Pop quiz: Did you know that the Coast Guard is actually older than the Navy? The CG came together in 1790 as the Revenue Cutter Service, a customs enforcement agency. That same year, the United States disbanded the Continental navy, the Revolutionary War fleet, and didn’t officially form the U.S. Navy until 1798. (Although the U.S. Navy cites theirs to the founding of the Continental navy in 1775.) In 1915 the RCS  merged with the United States Lifesaving Service to…