United States. Army Division of Military Aeronautics · leaf 358
PLATE XXXII. — Lines of support (1) Flanders, Sissonne. … LINES FOR FALLING BACK— FLANDERS, SISSONNE. 1. Lme for falling back under construction. 2. Lines are only traced. Two small inclosed defenses are the only ones begun. This tracing was com- pletely changed later. (See photo below.) 3. Falling-back line under construction. — ^A. Excavations for…
Balloons · Aeronautics, Military
Internet Archive · Smithsonian Libraries · Public domain (published before 1931). Free to use for anything.
![An illustration from [Balloon notes], 1917, leaf 358](https://img.insideoutlibrary.com/img/1024/ia-balloonnotes02unit-358-0.webp)
