Few people had any concept of what a modern war would be like. When war was declared, crowds all over Europe cheered what they believed would be a short, glorious war which their side couldn’t lose. Clockwise from top left: crowds at Buckingham Palace cheer the declaration of war. French cavalry marches off to war. A Serbian priest blesses the rifles their country will use to kill enemy soldiers. German infantry marches to war. (Wikimedia Commons.
https://commons.wikimedia.org/wiki/File:The_Outbreak_of_the_First_World_War,_1914_Q81832.jpg,
https://commons.wikimedia.org/wiki/File%3AFrench_heavy_cavalry_Paris_August_1914.jpg,
https://commons.wikimedia.org/wiki/File:Old_Serbian_priest_blessing_rifles,_1914.jpg,
https://commons.wikimedia.org/wiki/File:Bundesarchiv_Bild_183-25684-0004,_I._Weltkrieg,_Mobilmachung.jpg