The Sulu and Celebes Seas, a semi-enclosed sea area and porous region that covers an area of space around 1 million square kilometres, have been subject to illegal maritime activities since the pre-colonial era and continue to pose a maritime security threat to bordering nations up to this day. While piracy has long been identified as an ubiquitous challenge, being historically interwoven with the region, recent incidents also include other types of maritime crimes such as kidnapping and the trafficking of humans, arms and drugs. Attacks mostly classify as 'armed robbery against ships' according to the United Nations Convention on the Law of the Sea as they occur in maritime zones that lie under the sovereignty of a coastal state. Incidents in the Sulu and Celebes Seas specifically involve the abduction of crew members. Since March 2016, the Information Sharing Centre (ISC) of the Regional Cooperation Agreement on Combating Piracy and Armed Robbery against Ships in Asia (ReCAAP) reports a total of 86 abductions, leading to the issue of a warning for ships transpassing the area.

The Sulu Sea is a body of water in the southwestern area of the Philippines, separated from the South China Sea in the northwest by Palawan and from the Celebes Sea in the southeast by the Sulu Archipelago. Borneo is found to the southwest and Visayas to the northeast.