Tu parle d'extermination toi, pas de raid.. =)
Va faire un tour sur le lien en bas, il y a tout ce que tu dois savoir sur les alertes et les types de mission.
Raid
In this type of mission, players are required to find an artifact, loot it, and return to extraction. This mission type is similar to Sabotage, the difference being Sabotage requires players to destroy a reactor core while Raid requires players to loot it.
Also, players will get a random mod as a mission reward on completion of a Raid mission. Unlike mods picked up from enemies, the reward mod has its card's picture on it on the mission summary screen.
Exterminate
In this type of mission, players are simply required to kill all enemies in the area, and then make it to extraction (Corpus Security Cameras and Defense Turrets are not counted as targets when deducting from the to-kill total). There is a counter below the minimap showing the number of enemies left. Once the given number of enemies has been depleted, additional enemies will not spawn, thus allowing you and any party members a stress-free run to extraction.
source : http://warframe.wikia.com/wiki/Missions