German Zeppelin L-30 in 1916
Credit - U.S. Air Force Museum
Taube and Etrich
Credit - (c) 2002 National Air and Space Museum, Smithsonian Institution (SI Neg No. 93-9676)
SPAD XIIIs at Lisle-en-Barrois with bombs
Gotha bomber
Credit - wwiaviation.com - permission pending