"Suffren" was ordered to escort "Gaulois" to Toulon via Malta on 25 March. Two days later the ships encountered a storm and were forced to seek refuge in the Bay of Navarin. "Suffren" arrived at Toulon on 3 April and was repaired by 20 May when she returned to the Dardanelles to provide gunfire support for the troops ashore. She remained in the area until 31 December; upon returning to her anchorage at Kefalos on the island of Kos, she collided with and sank the British steamer "Saint Oswald", a horse transport involved in the evacuation from Gallipoli, and was badly damaged. "Suffren" arrived in Toulon on 20 January 1916 for repairs which were completed by April. That month she joined the French squadron of six predreadnoughts assigned to prevent any interference by the Greeks with Allied operations on the Salonica Front. On 9 July "Suffren" briefly became flagship of the reestablished 3e Escadre de ligne when "Patrie" departed for a refit at Toulon. With the creation of a rival pro-Entente government in Greece in August, the Entente became concerned that the royal government might interfere with its use of Greek ports in October as King Constantine I endeavored to maintain Greek neutrality. On 7 October "Patrie", "Démocratie", and "Suffren" entered the harbour of Eleusina prepared to fire on the Greek predreadnoughts , and the cruiser , but things were resolved peacefully and the French ships returned to their base.