How was World War 1 a "global war"?

It was to take over a lot of the world, world wide domination. The war was spend out in parts of Africa, South America, China, and Japan. Germans wanted to take over a lot of land and make it their own, so I would say that World War 1 would be a "global war."

2nd Question

I think that a world war can be created by nuclear weapons, if another country has them and the others are scared of them they can all attack that country to save themselves. i think that today a world war could be created by all the commotion of the economy and how bad it has become and all the other countries in need that need our help and we cant help them.

helllllooooo

I am Sarah and Gun Gun is my best friend...Fo Sho.! :)