The is a joint force that is constituted and so designated by the secretary of defense, a combatant commander, a subordinate unified commander, or an existing joint task force commander to accomplish missions with specific, limited objectives and which do not require overall centralized control of logistics. it is dissolved when the purpose for which it was created has been achieved or when it is no longer required.

The Joint Task Force, also called JTF, is a joint force that is constituted and so designated by the Secretary of Defense, a combatant commander, a subordinate unified commander, or an existing Joint Task Force commander. [...]

The concept of a joint ad hoc military formation emerged in the 1920s and 1930s with the U.S. Navy. However, "combined" is also used in the British-American term to designe multi-national forces such as the CCTF -Commander Combined Task Force- or CJTF -Combined Joint Task Force.