Tannenberg is the German name for the formerly East Prussian, now Polish, city of Olsztynek[?]. It is still widely known by its German name due to two famous battles fought in its vicinity, in 1410 and 1914.
... was released in Japan and Europe but not in the United States.
However, because the GBA has no region lockout, European games will work fine on a U.S. GBA unit, ...