Alliances and treaties involved nations and colonies all over the world.
This was the first global conflict, with estimates ranging from 15 - 50 Million people killed. Many new independent countries were created as a result of this war.
The submarine.
World War 1
Because the parties directly involved practically all were Empires who together ruled most of what later became known as the Third World. When they got engaged in the war, their colonies automatically also got engaged. And so the war got global in scope.
World War I was a truly global conflict. Networks of alliances forced countries to become involved in the fighting, even if they did not directly have a stake in the conflict.
World War 2.
Strategic Command WWII Global Conflict happened in 2010.
Strategic Command WWII Global Conflict was created on 2010-03-04.
It never was a global conflict.
It never was a global conflict.
It never was a global conflict.
It never was a global conflict.
World War I was a genuinely global war. It involved countries that were not even indirectly involved in the drama regarding the assassination of Franz Ferdinand. Since many alliances had been made, countries all over the world were obligated to declare war on one another.
The revolution was NOT a global war.
because many countries and continents were involved in the conflict.
The "Cold War" .