For many different reasons, but primarily for control of the Suez Canal.
They fought in campaigns in the Middle East and South East Asia.
Australian fought on the eastern and western front and the middle east.
The Middle East, mostly in Iraq.
World War I was fought over nearly the entire globe. Naval battles were fought in the Atlantic, Pacific and Indian Oceans and countries from most continents were involved in the fighting. The war was fought in Europe, the middle east, Asia, and many other locations.
World War I was fought in many countries. The "most famous" battlegrounds are in France and Belgium, but fighting also occurred in Serbia, Russia, Africa, the Middle East, Asia, Pacific islands, etc. It was a world war, after all.
World War I was fought on two major fronts. The Eastern Front was located in the Middle East and the Western Front was situated in France.
It fought in the Middle East, Papua New Guinea and South East Asia.
There have been several wars fought in the Middle East. To the best of my knowledge, none have named - either formally or colloquially - the "Middle East War". You'll have to be a bit more specific about which war you had in mind.
The two world wars. Korea Vietnam The Middle East war (1991 Gulf war and 2003-8 Iraq war).
Approximately 15,600 soldiers from the Caribbean fought in World War 1 as part of the British West Indies Regiment, with the majority coming from Jamaica, Trinidad, and Barbados. They served in various theaters of the war, including the Middle East and Europe.
The Ottoman Empire ruled most of the Middle East from the 1500s until World War 1.
Australians fought in Turkey, the Mid-East, and Western Europe in WW1.