Which type of mobilization entails mobilizing all Reserve Component units in the existing approved force structure, as well as all individual reservists, retired military personnel, and the resources needed to meet requirements of a war or other national emergency involving an external threat to the national security, and is for the duration of the emergency plus six months?

The correct answer to the question: Which type of mobilization entails mobilizing all Reserve Component units in the existing approved force structure, as well as all individual reservists, retired military personnel, and the resources needed to meet requirements of war or other national emergency involving an external threat to the national security, and is for the duration of the emergency, plus six months? Would be: Total mobilization.

Explanation:

When talking about responding militarily to a threat, the United States military has a series of activation, deployment and mobilization stages, each of which will necessitate of the participation of one or more of the military units available, including the Reserves, to respond to a perceived threat. The level of this deployment and mobilization process depends entirely on the type o threat and the seriousness and can be initiated either by Congress, the President, or in the last and most serious case, both. Total mobilization is the last stage and it requires the activation of all the members of the military, including retired personnel, reserves and all other resources. This stage has to be initiated both by the President and Congress.