Where was the First World War?

World War I was the first time in history, and there were battlefield wars all over the world.

Before World War I, ancient Rome and Carthage fought between Europe and Africa.

Alexander attacked India,

Genghis Khan spread all over Asia, but stopped in Europe.

The Crusades and the Ottoman wars spanned Europe, Asia and Africa.

The Spanish-English War, the Spanish-English War and the 80-year War began to involve the United States.

The Thirty Years' War, the Seven Years' War and the Napoleonic War almost all involved Europe and America.

The Russo-Japanese War and the Spanish-American War were involved in Asia.

All previous colonial wars, slave wars and Boer wars involved sub-Saharan Africa.

But World War I was the first time in the world that all continents fought for it.

Needless to say, Europe,

The United States 19 17 entered the war, and Canada was the Commonwealth.

There is a naval battle in Falkland, South America, and Brazil is an ally.

There are colonial wars in East Africa (Cameroon, Somalia).

Turkey joined the Allies as the Near East,

Many Sunni Middle Eastern countries indirectly support Britain because they are colonies.

India and Beiyang government are allies,

Japan and Germany pursued Speer's fleet in Qingdao and the Pacific Ocean and occupied many German colonies.

Australia not only landed in Daniil and Garipoli with Commonwealth troops, but also killed the German Emden with the cruiser Sydney at home.

There are battles in all continents and seas (except the poles).

PS, the name World War I didn't appear until after World War II. It was called "Great War" before World War II, mainly to highlight its tragedy, not "cosmopolitan". After World War II, because the two wars were similar in scope and situation, they were generally called "World War I".