Interesting that he was American but served in the RFC (predecessor to the RAF). I didn't know that you could do that. It seems that back then nationality was a looser concept? We didn't yet have the closed border regime that we have now across the first world. But there had to be limits, especially given the war. Inquiring minds want to know...
i've heard of many the european that served in another european army. maybe it's just the u.s. that's missing out.