Gallipoli 1915: Complete Field Guide — Helles, ANZAC, Suvla & the Ottoman Defence

Gallipoli was an Allied attempt to force the Dardanelles, threaten Constantinople and reopen a maritime route to Russia. It began as a naval project, became a land campaign after the fleet failed to break through the Ottoman minefields and batteries, and ended in evacuation after eight months of fighting.

The campaign is now inseparable from Australian and New Zealand national memory, and rightly so: ANZAC troops fought some of the hardest actions on the peninsula. But reducing Gallipoli to ANZAC alone removes more than half the force that went there and obscures the British and Irish landings at Helles, French and colonial fighting, Indian service, the Newfoundland contribution and the Ottoman defence that defeated the operation.

Gallipoli at a glance

Why the Allies attacked the Dardanelles

The strategic idea was larger than the peninsula itself. The Dardanelles controlled access from the Aegean to the Sea of Marmara and onward through the Bosphorus to the Black Sea. If Allied naval forces could pass the straits, they could threaten the Ottoman capital, strengthen communications with Russia and potentially force the Ottoman Empire out of the war.

The concept also reflected the search for alternatives to deadlock on the Western Front. That did not make the Dardanelles an irrational target. It did make the operation dependent on assumptions about mines, coastal artillery, Ottoman resilience, logistics and the speed with which a naval success could be converted into political collapse.

18 March: the naval solution fails

British and French warships attacked the straits in February and March. The critical assault on 18 March failed after mines and shore batteries inflicted severe losses. Three battleships were sunk. The minefields remained intact enough to block the route.

The operational problem now changed completely. A fleet that could not force the Narrows needed troops ashore to seize the ground commanding the defences. That meant an amphibious invasion of a difficult peninsula against an enemy that now knew where the threat was coming.

The Mediterranean Expeditionary Force was broader than ANZAC

Hamilton assembled roughly 75,000 men for the initial expedition. Australians and New Zealanders made up almost half, but the rest came from other formations that disappear too easily from popular memory.

• British 29th Division: the principal regular British formation for the Cape Helles landings.
• Royal Naval Division: sailors and Royal Marines reorganised for land service.
• Australian and New Zealand Army Corps: 1st Australian Division and the New Zealand and Australian Division under the wider ANZAC command of Lieutenant-General William Birdwood.
• French force: a French colonial division from North Africa formed part of the expedition; French troops first conducted a diversion at Kum Kale and later fought in the Helles sector.
• Indian Expeditionary Force: Indian Army troops provided infantry, mountain artillery, transport and other capabilities during the campaign.
• Newfoundland: the Newfoundland Regiment later joined the campaign at Suvla. In 1915 Newfoundland was a separate Dominion, not part of Canada.

This distinction matters. “British” and “ANZAC” are not interchangeable, and “Commonwealth” is modern shorthand for a wartime system that actually consisted of British, Dominion, Indian and colonial formations with different identities and chains of command.

25 April: three different operational problems

Cape Helles

The main British landing took place at Cape Helles at the southern end of the peninsula. Troops landed across several beaches under heavy fire. At V Beach the converted collier River Clyde was used to put men ashore directly under the Ottoman positions. The landings gained a foothold but did not rapidly seize the heights around Achi Baba and the village of Krithia.

British and later French troops then fought repeated battles in the Helles sector. The result was not the quick opening of the Narrows envisaged by the original plan but another trench front.

Anzac Cove

Birdwood's ANZAC force was intended to land near Gaba Tepe, move inland and seize the Sari Bair heights. The covering force came ashore north of the intended point at what became Anzac Cove. The ground was immediately punishing: narrow beaches, steep spurs, gullies and ridges broke formations and made navigation difficult.

Australian troops landed first, followed by New Zealanders. They established a precarious perimeter but could not secure the operational objectives inland. Ottoman counter-attacks prevented the beachhead from developing into the breakthrough the plan required.

Kum Kale and the French role

French colonial troops attacked Kum Kale on the Asian side as a diversion, helping to complicate Ottoman command during the main landings. French forces subsequently transferred to Helles and became a continuing part of the Allied line. Gallipoli was therefore Anglo-French as well as British-Dominion from its opening phase.

The Ottoman defence

The campaign cannot be understood only through Allied mistakes. The Ottoman Army defended effectively. Its formations used the peninsula's ground, moved reserves to threatened sectors and repeatedly counter-attacked before Allied beachheads could become operational breakthroughs.

Mustafa Kemal, commanding 19th Division, became especially important around the Anzac sector. His intervention helped block the Allied advance toward the heights on 25 April and again during the August fighting. Later national memory made Kemal central to the Turkish story of Gallipoli, but the wider Ottoman defence depended on many formations and commanders across Helles, Anzac and Suvla.

Helles: not a sideshow

Repeated attempts to take Krithia and Achi Baba failed. British, Irish, French, Indian and Dominion troops were drawn into costly attacks. New Zealand infantry, for example, was temporarily transferred south and suffered heavily at the Second Battle of Krithia on 8 May.

The failure at Helles mattered strategically because it meant the Allies never secured the commanding ground needed to dominate the Narrows. The campaign became a contest of local attacks without the operational freedom required to achieve the original naval-strategic objective.

Life in the beachheads

Combat was only part of the problem. Water supply, sanitation, flies, disease, heat, exposed beaches and restricted movement degraded fighting power. Anzac in particular was a cramped logistical base under observation and fire. At Helles, the same narrow communications routes had to carry ammunition and reinforcements forward while moving wounded men back.

This is where the Indian contribution becomes especially important. Indian Army units were not simply decorative additions to an imperial order of battle; mountain artillery, transport and infantry helped sustain operations in terrain where ordinary wheeled movement was difficult.

August: the attempt to break the deadlock

By summer the April lodgements had failed to produce decisive movement. Hamilton therefore backed a more ambitious August offensive.

At Anzac, the plan called for attacks toward the Sari Bair heights while a new British landing at Suvla Bay opened another front to the north. The assaulting force around Sari Bair included the New Zealand and Australian Division, the British 13th (Western) Division, the 29th Indian Brigade and part of the 10th (Irish) Division. This was coalition warfare at formation level, not one national army fighting alone.

Lone Pine, the Nek and Chunuk Bair

Australian forces attacked at Lone Pine and the Nek as part of the wider effort to fix Ottoman troops and support the breakout. New Zealand troops reached and briefly held Chunuk Bair, one of the rare moments when Allied forces occupied part of the key Sari Bair high ground. The position could not be held after relief and Ottoman counter-attack.

These actions became powerful parts of Australian and New Zealand memory because of the intensity of the fighting and losses. Their importance does not require removing the British, Indian or Irish formations operating in the same August plan.

Suvla

The Suvla landing achieved surprise but failed to turn the beachhead into a rapid seizure of the surrounding heights. Delay, uncertain command and fierce Ottoman resistance allowed the defender to strengthen the ground. The chance to connect a decisive Suvla advance with the Sari Bair attack disappeared.

The Newfoundland Regiment later served in the Suvla sector. Its presence is another reminder that the Dominion contribution to Gallipoli reached beyond Australia and New Zealand.

Why Gallipoli failed

• The naval operation did not remove the mine and battery problem. The land campaign inherited a task the fleet had failed to solve.
• Terrain favoured the defender. Ridges, gullies and narrow beaches broke up movement and made observation difficult.
• Objectives were ambitious relative to time and force. Beachheads had to become rapid inland advances before Ottoman reserves reacted.
• Command and coordination were uneven. Separate sectors did not generate a decisive operational effect.
• Logistics constrained everything. Water, ammunition, evacuation and reinforcement all had to pass through exposed coastal lodgements.
• The Ottoman Army fought effectively. Allied failure was not self-inflicted alone; the defender repeatedly prevented local gains becoming strategic success.

Was the evacuation the best-run part of the campaign?

In operational terms, yes. After the August failure, the British government increasingly questioned the value of remaining. Hamilton was replaced by Monro, who recommended evacuation.

Anzac and Suvla were evacuated in December with remarkably low losses during the withdrawal. Helles followed in early January 1916. The contrast is striking: an operation that had struggled to coordinate landings and offensives executed a complex withdrawal with discipline, deception and detailed planning.

Casualties and memory

The campaign cost the Allies tens of thousands of dead. New Zealand official history records around 44,000 Allied deaths, including more than 8,700 Australians and 2,779 New Zealanders. Ottoman losses were also enormous. Exact totals vary by definition and source, so the important historical point is the scale rather than a falsely exact combined number.

For Australia and New Zealand, Gallipoli became foundational to national remembrance. For Britain and Ireland, it was one campaign among a much larger war and has often sat in the shadow of the Western Front. For India, Newfoundland and French colonial troops, their presence is frequently omitted from popular retellings altogether. For Türkiye, Gallipoli became bound to the defence of the homeland and the later reputation of Mustafa Kemal Atatürk.

Iron Standard judgement

ANZAC deserves its central place in Gallipoli memory. It does not deserve to become a substitute for the whole order of battle. The campaign was an Allied coalition operation defeated by an effective Ottoman defence. The Australians and New Zealanders were exceptional soldiers inside that coalition; so were formations from Britain and Ireland, India, Newfoundland, France and the wider imperial system. The strongest history makes each contribution more visible, not less.

Sources and further reading

• NZHistory — Gallipoli in brief
• NZHistory — Invasion and landing plans
• NZHistory — Sari Bair and the August offensive
• Australian War Memorial — Gallipoli campaign

Continue the First World War archive

• The political road to war
• Western Front 1914–1918 campaign guide
• World War 1 medals and how to trace them

History first. Memory with context.