Churchill always said the Admiralty caused the failure of the Gallipoli campaign, by attempting to break thru the straits using old dreadnaughts, whose straight trajectory main armament were next to useless for infantry support. The Turks, under advice from the Germans, used mobile field howitzers which attacked the Battleships thinly armoured decks from a near vertical angle. I have read where a minefield of only 18 mines was responsible for most of the sinking of French and British ships. This attempt at forcing the straits alerted the Turks to the danger of a landing on the Gallipoli Peninsula, and reinforcements were sent . The Australians did indeed drift North , to the wrong landing place. Mustapha Kamal, the commander of the Turks at Gaba Tepe, sent his 57th Regiment to push the Aussies off the Sari Bair ridge, with the order " I'm ordering you not to attack, but to die ". The Gallipoli Association has an extensive record of the whole campaign. Sometimes we forget there were many more English and French than Australians involved.
From the Gallipoli Association;
Naval Travails - The Gallipoli Association (gallipoli-association.org)
Preparations;
Preparations - The Gallipoli Association (gallipoli-association.org)
The landings ;
The Landings - The Gallipoli Association (gallipoli-association.org)