the Central Powers and the United Powers

Europe and Russia

the Allies and the Central Powers

Austria-Hungary and the Ottoman Empire

prove that the war was fought all over the world.

inform the reader who fought on which side.

explain why each country joined the war.

show how many countries were destroyed.

It is the only world war in history, so we know which war we are talking about.

What we call the war does not change how important and devastating it was.

We can come up with nicknames for it, but Europeans call the war something else.

The war goes by too many names so we should just say what years the war was.

in conflict with each other

evil or villainous

unprepared, not ready

very similar to each other

why the United States entered the war.

how the war was different from previous wars.

how the war was fought and why it ended.

who was involved and when the war happened.

Then

So

Although

Because