Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: If a golf course were to be created in Hell it might resemble the now serene landscape of Gallipoli, where the blood of thousands was spilled a century ago in one of World War I’s most spectacular Allied failures. An eerie serenity pervades the rolling landscape of this peninsula and, in the bright spring sunshine, there could scarcely be a more peaceful spot for a Sunday afternoon stroll. But a chill is never far from the spine, whatever the temperature. Scroll down for video Sulva Bay, Gallipoli Peninsula, Turkey, where in the World War I there were nearly 400,00 Allied casualties25 April is the centenary of the  ill-fated Gallipoli invasion by Allied troopsAllies sustained heavy loses, mown down by a better-equipped Turkish armyBeautiful peninsula is a magnet to relatives of soldiers killed in the battleThe Water Diviner, Russell Crowe's directorial debut, is set in its aftermath 
 Question:_ soldiers land and begin the attack at Gallipoli, sometimes known as the Dardanelles Campaign.

Allied