The Greeks' location at the top of the Mediterranean Sea was a uniquely advantageous physical position because it allowed them to trade with the rest of Southern Europe and Northern Africa without inhibitions. It also gave them a great naval presence.
The war started mainly because of four aspects Militarism Alliances Imperialism and Nationalism. This is because big armies become potential threats to other countries.
Chemical warfare was considered deadly during WWI because the technology was new and no one had Gas masks. And because no one had gas masks it would often kill or injure many solders.
