28th. Apr. 1915 (Gallipoli) 1st Battle of Krithia. 14,000 Allied troops participated, suffering 3,000 casualties. The scale and duration of the battle was minor compared to later fighting but the battle was one of the most significant of the campaign as it proved that the original British assumption of a swift victory over an indifferent enemy was grossly mistaken. Thereafter, Helles would become the scene of numerous attrition battles and success would be measured by an advance of 100 yds.