Located to the west of Sedd el Bahr Village and protecting the entrance of the Dardanelles Strait, Ertuğrul Bastion was built in a position overlooking the sea at Hill 159. The bastion was constructed through the efforts of Asaf Pasha during the era of Abdulhamid II. The monolith of the construction was removed and is currently lost. The bastion was formed of 3 bonnets and 2 gun platforms. The bastion was also equipped with 2 long-range Krupp barreled guns. The parts of only one cannon are found at the bastion. It is believed that the headquarters was located at the same spot as the Sergeant Yahya Martyrs’ Cemetery. The bastion was intensively bombarded from February 19-25, 1915 and was rendered inoperational prior to the naval battle of March 18, 1915.

While being buried, it was restored in 2006 by the Ministry of Culture and was opened to visitors. A model of the bastion animating the landing on Ertuğrul Bay (V Beach) is found here. War artifacts are currently exhibited inside the bonnet situated in the middle. The exhibition is open between 8:00 a.m. and 6:00 p.m. and is free of charge for families of the martyrs, privates, petty officers, journalists holding yellow press cards, and primary school students. 
 

25 April 1915 Landing at Cape Helles 
“In the morning, the murderous machine guns began to fire followed by the firing of the ships turning everything upside down, not spelling anyone at the wheel. Some of the heroes that have advanced into the enemies were unable to retreat and faced the firing of the enemy forces. Before noon, the enemy kept its old front and the courageous Turkish assault was quelled. The bones found on the ways and plain of Sedd el Bahr were the bones of these anonymous Turkish heroes. They were the heroes of the night (that fought soldierly, manly and died with honor).

The uncommanded night assaults at Sedd el Bahr cost much to us a pretty penny. We lost 16.000 privates. Yet we managed to break the attacking power of the enemy and they were now intimidated. They came to attack us; yet we met them with our counterattack and dispirited them; the enemy was not able to achieve again. If we only had thought of defense and given the enemy a freedom of movement at the first instance, the spirited enemy taking initiative would have broken the lines of defense and would have achieved their goal, as they were reinforced by a fierce firing power. It was after all, the success of the Turkish soldiers”.