I'm impressed! A lot of people seem to be very intelligent here, What else can we find in this image? The hammer and sickle has been mentioned, nobody commented on the "UN standard issue" stamp on the instep of the boot in question IIRC. From what I see, the helmet shape seems to be that of either the US or Germany, while the foresight and gas tube on the weapon seems to be that of the G3 family.
Going off on another tangent here, Germany is an often maligned country. My sister live in Germany for a year ('97-98) as an exchange student in Chemnitz, which IIRC is in the former East Germany. While she was studying there, they had her take History as part of the curriculum, and she's told me before that a History class in Germany is very very much different than here in the States. IDK if this applies to only Eastern Germany, or all of Europe, but the US was seen as an aggressor in the history books, not Germany as an aggressor towards everybody.