Mr. Roger’s Weapons of WWI Project
Trench Warfare
http://www.spartacus.schoolnet.co.uk/FWWtrench.htm
http://www.firstworldwar.com/features/trenchlife.htm
Poisonous gas
http://www.firstworldwar.com/weaponry/gas.htm
http://www.worldwar1.com/arm006.htm
Machine guns
http://www.firstworldwar.com/weaponry/machineguns.htm
Barbed wire
http://www.barbwiremuseum.com/Warwire.htm
http://www.diggerhistory.info/pages-weapons/barbed-wire.htm
Flame-thrower
http://www.firstworldwar.com/weaponry/flamethrowers.htm
Grenades
http://www.firstworldwar.com/weaponry/grenades.htm
Tanks
http://www.firstworldwar.com/weaponry/tanks.htm
Communication:
http://www.history.navy.mil/library/special/homing_pigeons.htm
Misc.
http://www.eyewitnesstohistory.com/w1frm.htm