Why the Coast Guard is part of the Department of Homeland Security
The United States Coast Guard has a long history, dating back to 1790 when President George Washington signed the Tariff Act. The Coast Guard has been overseen by three different federal cabinet departments over the years. Notably, it is not part of the Defense Department, despite being a military service branch.
Further details about the Coast Guard's history and its current status are available, including information about its origins as the Revenue Cutter Service and the role of Alexander Hamilton in its creation.