Sexion d'Assaut (French pronunciation: [sɛksjɔ̃ daso]), formerly known as 3ème Prototype (for "Troisième Prototype" [tʁwɑzjɛm pʁɔtɔtip]; English: "3rd Prototype"), was a French hip hop band formed in 2002, composed of eight Parisian rappers.

They are signed to independent record label Wati B, which is under exclusive license to Sony Music Entertainment France.

Pétrodollars, Alpha Diallo, Maska and Lefa.

They also retain the style of old school hip-hop, but keep underground influences and spent almost a decade fostering an underground fanbase before releasing their debut studio album L'école des points vitaux in 2010.

Their album L'École des points vitaux in 2010 went quadruple platinum.