[3] In order to supply U.S. allies, much more production was required than was possible through the firms producing the M2 (and the larger M3 half-track).

It was laid out to provide similar stowage, access to the radios from the inside, rear doors, and a pedestal machine gun mount as with the M2.

[9] According to American military historian and defense specialist Steven Zaloga, 2,026 M9s and 1,407 M9A1s were produced in 1943.

The production of M9s was leased to other countries, like most other IH half-tracks produced in World War II.

This M9A1 was leased to both the Soviet Union and the United Kingdom, with the latter providing it to other countries in the British Commonwealth.

[12] Following World War II, the second-hand market was a source of supply for some countries, including Israel.