German Zeppelins of WWI

Mathy’s airship was a giant cigar-shaped cylinder of gas bubbles filled with highly flammable hydrogen.

Biplane picture gallery 2 by Mark Bromley

DH9 Refuel - Military Times - Mark Bromley

The second image gallery of  Biplane picture gallery from artist Mark Bromley, revealed here in Military Times for the first time. Bristol F.2 Fighter