tactical systems / employed chlorine gas / Counter-gas measures / gas-masks / tactical-operational systems / railway systems / poison gas / industrial weapon technologies / operational systems / updated equipment / gas shells / trench systems / battlefield technologies / practicable solution / fixed defensive systems / deep and elaborate systems / sought solutions / embryonic wireless communications / /
NaturalFeature
Mort Homme / river Isonzo / Côte / Flaucourt plateau / river Aisne / /
Organization
Austro-Hungarian infantry / British Citizen Army / American Army / Austro-Hungarian Army / Divisions and Army Corps / army / Russian army / Moroccan Division / US Federal Reserve / Italian Army / German army / French Army / /
Person
Aleksei Brusilov / Wilhelm / Prince / Marie-Émile Fayolle / Erich von Falkenhayn / Douglas Haig / John Pershing / Henry Rawlinson / Robert Nivelle / Émile Fayolle / Joseph Joffre / Philippe Pétain / /
Position
butcher / innovative commander / General / responsible army commander / commander / Crown Prince / As professor of strategy / /