World War (1914-1918) 1 [vynechat] armed conflicts 1 [vynechat] armed forces 1 [vynechat] dejiny objavov a vynálezov 1 [vynechat] discoveries and inventions 1 [vynechat] errors 1 [vynechat] history of discoveries and inventions 1 [vynechat] innovations 1 [vynechat] inovácie 1 [vynechat] objavy a vynálezy 1 [vynechat] omyly 1 [vynechat] ozbrojené konflikty 1 [vynechat] ozbrojené sily 1 [vynechat] prvá svetová vojna, 1914-1918 1 [vynechat] technology 1 [vynechat] technológie 1 [vynechat]