Historians who study the twentieth century quickly discover that the word "war" covers an enormous range of experiences. A border clash lasting a few weeks belongs in a different category from a struggle that consumes whole societies for years. For IB History, learning to classify conflicts is the first analytical skill, because the type of war shapes almost everything else: how it is fought, who is affected, and what it leaves behind. This lesson introduces the main categories and shows how real conflicts often blend several of them.
The idea of total war describes a conflict in which a state mobilizes all of its resources—economic, human, industrial, and psychological—toward victory, and in which the traditional line between soldiers and civilians becomes blurred. The First and