A brown-water navy or riverine navy, in the broadest sense, is a naval force capable of military operations in littoral zone waters. The term originated in the United States Navy during the American Civil War, when it referred to Union forces patrolling the muddy Mississippi River, and has since been used to describe the small gunboats and patrol boats commonly used in rivers, along with the larger "mother ships" that supported them. These mother ships include converted World War II-era mechanized landing craft and tank landing ships, among other vessels.
A United States Navy Monitor, a brown-water navy vessel, firing napalm during the Vietnam War
Barroso, a Brazilian ironclad of the central casemate type, the first vessel to dash past the Fortress of Humaitá on the River Paraguay
The large landing craft NRP Alfange supplying the garrison of Bambadinca, Portuguese Guinea, in the early 1970s.
A river pirate is a pirate who operates along a river. The term has been used to describe many different kinds of pirate groups who carry out riverine attacks in Asia, Africa, Europe, North America, and South America. They are usually prosecuted under national, not international law.
The Yangtze River of China, a hotbed of river pirate activity from the nineteenth century until the end of the Chinese Civil War in 1949, which was combated by patrols of American and European gunboat flotillas.
The Mekong River, where modern-day Asian river piracy exists.
A Mekong River sampan boat, typically used by modern-day Asian river pirates
The Balkan Narentines, of the ninth and tenth centuries, were known for piracy on the River Neretva. The Ushkuiniks were Russian Novgorodian Volga river pirates from the tenth to the fourteenth centuries. Both medieval river pirate groups were Slavic versions of Viking river raiders.