The answer is total war. Total war is a warfare methodology that supposes that it is valid targeting civilians in order to achieve victory. It is total in the sense that, since all the country, its resources and its population are involved in the war effort, the armies can attack civilians in order to cripple the other state's capabilities.
Trench warfare was mainly used during WWI and it revolves around digging trenches and defending positions. Traditional warfare is the one that faces two regular armies against each other and civilians are not involved. Guerrilla warfare consists of the use of irregular fighters in battle.
