A suicide mission is military operation that is expected to have few of the operatives survive the mission in order to achieve the expected goal. These are not to be confused(but can sometimes include) with Kamikaze attacks used by the Japanese during WWII. In most cases these missions are against a target that is considered important enough that the expected outcome of its destruction is considered worth the loss of the personnel assigned to the mission. As it is expected that all of the personnel assigned to the mission is not expected to return, they often do not include a plan for the extraction of the assigned operative but most missions will at least plan for their survival and rescue. The best example of a suicide mission would be the famous Doolittle Raid of Tokyo during WWII.