The eight and a half month-long Gallipoli Campaign involved a total of about one million men from both sides, of whom between one-third and one-half became casualties. Precise figures are unavailable for some nations.

Approximately 469,000 British Empire soldiers served in the campaign (328,000 combatants and 141,000 non­combatants). About 120,000 became casualties, of whom over 34,000 died. The maximum British Empire strength at any time in the theatre was 128,000 personnel (85,000 combatants and 43,000 non-combatants).

About 500,000 Turkish soldiers are believed to have served on Gallipoli and their casualties are estimated at between 250,000 and 300,000, of whom 87,000 died.

Between 50,000 and 60,000 Australians served on Gallipoli and a total of 8,709 were killed in action or died of wounds or disease. In addition, a total of 19,441 Australians were wounded (including those wounded more than once) and 70 Australians were captured; 63,969 Australian cases of sickness were reported in the Gallipoli campaign.

Of the 8,556 New Zealanders who served in the campaign 2,701 died and 4752 were wounded (including those wounded more than once).