Turkey was of no mind to leave the enforcement of this "ancient rule" to the powers. She began the construction of more elaborate fortifications commanding both the Bosphorus and the Dardanelles. German advice, especially after the Franco-Prussian War, was asked and obtained and Krupp sent some of his gigantic pieces for the defense of the narrow waters. This German cooperation with the Turks in the strengthening of those positions through all the years that have intervened is significant.
FORTIFICATIONS AND STRENGTH--FIRST MOVEMENTS
Let us inspect the fortifications in the Dardanelles at the beginning of the war in 1914. The Dardanelles, from end to end, have a length of forty-seven miles. From the town of Gallipoli to the Ægean, however, the full distance of the narrow section of the waterway, is a matter of thirty-three miles. At one point the passage is less than 1,400 yards wide and at no point is it more than 7,000. Although there is a good depth in much of the channel, shallows are to be met with in most unexpected places. To make navigation even more difficult, there is a swift and powerful surface current running through the Narrows, on some occasions at a speed of eight knots an hour. In addition there is not only a strong undercurrent, but, as well, many cross currents. At certain seasons of the year the wind and weather make navigation of large vessels almost impossible.
Both sides of the Dardanelles offered natural positions of enormous advantage to a defending force. On the Gallipoli side were a tangled mass of rocks and hills, almost devoid of vegetation except for stubby yellow bushes. In a few of the little valleys, stray clusters of olive trees relieved the monotony of the view. Heights rose upon heights and along the shores of the peninsula nearly perpendicular cliffs made landings almost out of the question.
This whole peninsula was a difficult country to traverse even in times of peace. No large maps existed of its intricate paths, there were few roads, and those that did exist were so commanded by heights and concealed positions for guns and infantry that the progress of an attacking force would inevitably be most difficult and costly.
Water was almost nonexistent. Most of the available supply was so protected that an attacking force would in no case be able to use it until its task of conquest was complete. As such a force advanced inland, these difficulties as well as those of the country would constantly and rapidly increase. From Cape Hellas, at the tip of the peninsula where a sandy beach made a landing possible, if difficult, the ground rapidly rose to a height of 140 feet. Hill country then led to ridges standing 600 feet, while a mile and a half beyond stood 600 feet in the air the commanding peak of Achi Baba, destined to play so large and so tragic a part in the struggle for the peninsula of Gallipoli. At the narrowest part of the Narrows, the real key position to the straits, stood the Kilid Bahr plateau, 700 feet, while to the northwest, almost 300 feet higher, stood the precipitous eminence of Sari Bair, a dense mass of trackless ravines and thickets.