It was assigned throughout its history to the Ninth Air Force.

During the winter of 1943-44 Ninth Air Force expanded at an extraordinary rate.

It shared its commander with Ninth Air Force until August 2009.

Assigned to Ninth Air Force as a photographic reconnaissance unit.

The group eventually moved to England as part of Ninth Air Force.

In October 1943 the station was transferred to the Ninth Air Force.

Ninth Air Force resumed control over the 20th on 22 January 1951.

The 436th trained for duty in Europe with the Ninth Air Force during 1943.

Early in September the Ninth Air Force made the city its primary objective.

All deployed aircraft came from the Ninth Air Force.