This isn't mentioned in canon anywhere, but just for info the British Army has maintained a permanent presence in Kenya since 1963 - the British Army Training and Liaison Staff Kenya (BATLSK) based at Kahawa Barracks outside Nairobi.
http://www.army.mod.uk/operations-de...ments/932.aspx
Its numbers are small, and I would suppose it's debatable whether or not it would have remained in place at all in the event of a full blown War, but in the event that it did I'd imagine it's highly possible that its troops might find themselves attached to the 173rd Airborne (if you have the 173rd deploying to Kenya that is; otherwise they'd probably end up operating alongside the Kenyan Army).
Cheers