beginning search on the Black 97th Regiment and the Alaska-Canada Highway reveals this:
http://www.sandiego.edu/~kalenius/images/alaska28.jpg
and this page, yes! at The Ebony Society of Philatelic Events and Reflections
and as it turns out the 93rd, the 95th, and the 97th were all involved, while the 388th Engineer Battalion was up in Yukon Territory building the Canol Trail to provide oil for the WW2 machine.

living in Tok!

a photo history of the Black 97th!

Unlike the armed forces, the Merchant Marine was integrated from the start of WWII.