The Regiment began preparing for the
invasion of Gallipoli in early April 1915. Their training was focused on strength for the broken and steep terrain they would encounter. At this point the Regiment (then named the Otago Battalion) had four companies, 4th (Otago), 8th (Southland), 10th (North Otago) and 14th (South Otago). On 10 April they departed
Alexandria on the
Annaberg, a captured
enemy ship that was 'filthy beyond description, and abominably louse-ridden'. Three days later they arrived at
Mudros in the
Greek Islands, the staging area of the
Mediterranean Expeditionary Force.
The landing On 25 April between 2:30 and 4 p.m. the Otago Battalion troops disembarked from their boats at Gallipoli. This was after a significant gap in the landings from the rest of the invasion which had occurred before 10 a.m. that morning. The Battalion was ordered first to cover the left flank and then to
Plugge's Plateau where initial progress from the morning's landings had become bogged down. The Battalion was disorganized and was not incorporated into the broken front line as a single unit. Heavy fighting occurred until early the next morning. During this time several Ottoman counterattacks occurred but the Regiment held its ground, despite being without effective artillery support. The next morning brought a considerable Ottoman artillery barrage, which could now be returned by two New Zealand guns and supporting naval vessels. The 10th Company of the Battalion was sent to Steel's Post for two days of heavy fighting to aid the Australians already there. The evening of the second day was relatively quiet along the rest of the Otago Battalion line. The invasion force had a secure beachhead, but had failed to reach their planned targets or capture the heights around the landing site.
A failed offensive A limited offensive was instigated on 2 May to capture a ridge (later to be called Dead Man's Ridge) between Quinn's Post and Pope's Hill. It involved New Zealand and Australian troops, with the British in reserve. The Otago Battalion was to advance about 400 m along the ridge near Knoll 700, flanked by the Canterbury Battalion. The Otago Battalion was to lose about half its men as dead and wounded in the attack. On 26 October the 2nd Maori Contingent arrived at Suez from New Zealand adding 300 men to the Otago Infantry Regiment. == France and Flanders ==