- International law : The formal conduct of interactions between nation-states, both at the national level and on behalf of their citizens; generally accepted as first formalized by Hugo Grotius.
- hostis humani generis : A legal principle that certain acts, such as piracy, slavery and genocide, puts one outside the norms of civilization and makes one an "enemy of all mankind", subject to early forms of universal jurisdiction or summary action
- Universal jurisdiction : A concept in international law that allows a nation to prosecute an individual charged with offenses against humanity, with no requirement that the defendant or victim be a national of the Requesting State or indeed, that there are any links to the Requesting State and the defendant
- United Nations Convention on the Law of the Sea : Add brief definition or description
- Hot pursuit : Add brief definition or description
- Jolly Roger : The traditional flag of pirates, who owe allegiance to no nation, of a white skull and crossbones on a black field
- Historical pirates : Add brief definition or description
- Privateer : A privately owned, armed sea vessel with a governmental authorization, usually called a letter of marque and reprisal, to raid foreign commerce as part of its nation's policy, usually of economic warfare
- Declaration of Paris (1856) : The treaty ending the Crimean War, which had an appendix banning privateering as well as piracy
- Task Force 151 : A multinational naval task force, created around Expeditionary Strike Group TWO from United States Central Command, which is conducting counter-piracy operations in the waters off Somalia; now under Turkish Navy command
- Regional Cooperation Agreement on Anti-Piracy : Starting operations in 2006, a regional anti-piracy agreement for the Strait of Malacca, involving all the members of the Association of Southeast Asian Nations, as well as Bangladesh, China, Japan, South Korea, India and Sri Lanka
- Maritime Expeditionary Security Force : A component of the U.S. Navy Expeditionary Combat Command formed to provide integrated at-sea and coastal security.
- Association of Southeast Asian Nations : Association of South-East Asian Nations; treaty group formed in 1967, originally comprising Indonesia, Malaysia, the Philippines, Singapore and Thailand; Brunei was admitted as a member in 1984, Vietnam in 1995, Burma and Laos in 1997, Cambodia in 1999; Australia is a "dialogue partner".
- Somalia : A country located in the Horn of Africa, bordering Djibouti to the northwest, Kenya on its southwest, the Gulf of Aden at its north, the Indian Ocean at its east, and Ethiopia to the west.
- Strait of Malacca : One of the world's busiest waterways, passing Indonesia, Malaysia, the Philippines and Thailand, where piracy has been a major problem
- Gulf of Aden : Add brief definition or description
- Puntland : A semi-autonomous region in the northeast of Somalia whose capital is Garowe.