world wars

Century's defining battles

World wars are military conflicts involving many of the world's major nations across multiple continents.

The term typically refers to the two catastrophic conflicts of the twentieth century: World War I (1914–1918) and World War II (1939–1945).

Both reshaped national boundaries, caused tens of millions of deaths, and transformed global politics.

A feared third world war would likely involve nuclear weapons.

Opposites
scale and scope of conflict

world warsborder skirmishes

Small fights at boundaries

civil wars · proxy wars · territorial disputes · tribal conflicts · insurgencies

state of international relations

world warsworld peace

Global absence of conflict

global peace · détente · peacetime · peaceful coexistence · armistice

historical periodization

world warsinterwar period

1918 to 1939

postwar era · peacetime · Roaring Twenties · reconstruction era

Family

war, world, warrior, warfare, worldwide, wars, worldly, warring, worlds

Familiarity
Top 100,000
Profile
Known to kids · Used worldwide · Timeless · Negative · Everyday, not technical · Rated PG