How were wars fought in the 18th century compared to the 20th century in the revolutionary war?

In the 18th century, wars such as the American Revolutionary War were characterized by linear tactics, with armies engaging in open-field battles and relying heavily on formations and direct confrontation. Campaigns often involved traditional European-style warfare, with clear rules of engagement and the importance of maintaining honor. In contrast, by the 20th century, warfare had evolved to include trench warfare, guerrilla tactics, and advanced technology like tanks and aircraft, resulting in more complex and devastating conflicts. This shift led to a more total war approach, where civilian infrastructure and resources became legitimate targets, fundamentally changing the nature of combat.