Thousands of people worldwide marked the centenary of the Gallipoli campaign, a First World War mission that took place inside the Ottoman Empire between April 1915 and January 1916, on April 24. The campaign is believed to be one of the deadliest throughout the war.

In this video, Colour Sergeant Bugler Russel Piner, from the Royal Marines School of Music Portsmouth, performs the Last Post. Credit: YouTube/Royal Navy