The Vichy French units are basically static until turn 7, then they defend against the Allied landings and either switch to Free French or are eliminated. The Free French units then activate at the same time as the USA forces, and the USA player can produce new ones in Oran within limits. No French trucks are needed or provided in the normal piece limit, the French use supply moved by USA trucks or don’t use any at all when their “self-sufficient” characteristic is in effect. The “extra” bag of pieces has some to use for player variants.
I think the ANZAC and Free French forces fighting with the 8th Army are all abstracted out as UK forces which is fine by me. There were certainly political considerations with those forces in real life, but for game purposes they were all under a unified command.