Stupid of the Allies not to have kept Bulgaria onside. The Allies could have landed at Kavalla (Neapolis, don't know wnat the Bulgarians called it at the time) and invaded Turkish Rumelia and gone right to the gates of Istanbul. and the Dardanelles. The interesting thing is that even if the turks had stalled the Allies on the edge of Istanbul in trench warfare (and they might have) or moved the capital and used the Bosporus and Dardenelles as a moat , keeping both straits closed to shipping, it might well have been feasible to build canals to bypass both straits that would have been open to Russia by the end of the war as this article demonstrates.
Not to mention opening up a second front against Austria Hungary in Serbia and the Hungarian Plain.
Turkey presses on with Bosporus bypass ship canal plans
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In late April, Prime Minister Erdoğan publicly announced the details of his long-anticipated project, Kanal İstanbul, saying the government would create a new Bosporus in İstanbul.
12 April 2013 /REUTERS, ANKARA
Turkey will forge ahead with plans for a 45-km (30 mile) ship canal linking the Black Sea to the Sea of Marmara to try to ease congestion in the Bosporus Strait, one of the world's busiest waterways, the government said on Friday.
The "Kanal İstanbul" plans are a pet project of Prime Minister Tayyip Erdogan, who announced them ahead of a general election in 2011 in what many Turks dismissed as a prestigious but unrealistic vision.
The canal would turn the European side of İstanbul into part of a large island, running parallel and to the north-west of the Bosporus. Under the plans, land dug up may be used to fill in part of the sea and create a third airport and sea port.
"We believe that this is a very realistic project that will be talked about by the world," Deputy Prime Minister Ali Babacan told reporters in Ankara, adding the country's Higher Planning Council had decided to go ahead with the project.
He did not comment on the projected cost.
The Bosporus is the only maritime outlet to the world's oceans for Black Sea states.
Turkish officials estimate that some 150 million tonnes of oil and petroleum products pass through the environmentally sensitive waters each year. It is also an important export route for Russian and Ukrainian grains and other products.