The AEG C.IV was a German two-seat biplane reconnaissance aircraft that entered service in 1916. The C.IV was based on the C.II, but featured a larger wingspan and an additional forward-firing Spandau-type 7.92 mm (.312 in) machine gun. In addition to reconnaissance duties, the C.IV was used as a bomber escort, despite proving itself inadequately powered for the role. Nevertheless, the C.IV was easily the most successful of AEG's World War I B- and C-type reconnaissance aircraft, with some 400 being built and remaining in service right up to the end of the war.