During most of her service in the First World WarM28 was attached to the Aegean Squadron and tasked with coastal bombardment of Turkish positions. On 21 October 1915 she bombarded the Bulgarian port of Dedeagatch. On 20 January 1918, she had been stationed at Kusu Bay on the island of Imbros along with,, and when she was attacked by two Turkish vessels. The former and managed to trap M28 and Raglan in the bay and engage them in what became known as the Battle of Imbros. As a result of the battle M28 was sunk and suffered 11 of her crew killed while the rest were rescued by Allied vessels.