Identifying an old photograph for a museum exhibit

[Guest brumagener]

Hi, I work at a research library in upstate New York and we are considering using this photograph in a museum exhibit. It is of an officer (during World War I, I think) coming out of a Val St. Lambert store in Europe. The photograph is from our library's Val St. Lambert archives, which inlcudes material from the late 19th century through the 1950s. We'd like to find more information about who this person might be (a history professor I spoke with said it looked like General Pershing) but even just knowing was this an American, British, French, etc. officer would be of great help. I can send a larger resolution file directly if need be to anyone who might have info. Thanks in advance and I hope this is not out of the scope of the forum!

[HERITAGE PLUS]

Its Albert I, King of the Belgians and C-in-C of the Belgian Army in 1914.