What are some WW1 doctrines?

World War I saw the development of several military doctrines, notably trench warfare, which emphasized the use of fortified positions and resulted in a stalemate on the Western Front. The concept of combined arms emerged, integrating infantry, artillery, and later, tanks to enhance battlefield effectiveness. Additionally, the use of attrition warfare aimed to wear down the enemy through sustained losses. Finally, the doctrine of total war blurred the lines between military and civilian targets, leading to the mobilization of entire societies for the war effort.