 For as long as the United States Navy has existed, a special breed of sailor has continued to answer the call. Today they are known as the Maritime Expeditionary Security Force, but their legacy is as old as our Navy. From the rivers and coastline of our own nation during the War for Independence, to the muddy waters forking through the dense jungles of Vietnam, these brave sailors have taken part in countless battles and critical missions throughout our history. They've been called the Brownwater Navy, River Rats, or, most commonly, Riverines. With the dawn of the new era of great power competition, the 21st century has seen the scope of their mission evolve and expand. In 2020, Navy leadership ordered the Force to change its name to reflect its new mission. Officially retiring the coastal riverine name. These sailors are known as the Maritime Expeditionary Security Force. From providing port and harbor security to high value asset security, to operating in both littoral waters and the open ocean, the Maritime Expeditionary Security Force is a lethal, critical asset for our Navy. The U.S. Navy Maritime Expeditionary Security Force, reinforcing bluewater lethality, dominating in the littorals.