The Islamic State's West Africa Province (ISWAP) is a militant group and administrative division of the Islamic State of Iraq and the Levant (ISIL), a Salafi jihadist militant group and unrecognised proto-state. ISWAP is primarily active in the Chad Basin, and fights an extensive insurgency against the states of Nigeria, Cameroon, Chad, and Niger. It is a offshoot of Boko Haram with whom it has developed a violent rivalry, killing Boko Haram leader Abubakar Shekau in 2021. In addition, ISWAP is formally the umbrella organization for all ISIL factions in West Africa; the Islamic State in the Greater Sahara (IS-GS) is thus formally part of ISWAP, although the actual ties between ISWAP and IS-GS are limited.