Roques was appointed Minister of War in March 1916 after it had been ensured that the Commander-in-Chief Joffre, who had been criticised by the previous incumbent General Gallieni, had no objection to his appointment. Roques was sent on a fact-finding mission to Salonika after Britain, Italy and Russia had pushed for the dismissal of Sarrail, the theatre commander. To the surprise of Prime Minister Briand and Joffre, Roques returned recommending that Sarrail’s forces be built up to thirty divisions ready for an attack on Bulgaria. He did not specifically praise Sarrail, but recommended that Sarrail no longer report to Joffre. Coming on the back of the disappointing results of the Somme campaign and the defeat of Romania, Roques’ report further discredited Briand and Joffre and began the political manoeuvres which led to Joffre's removal. On 13 December Briand formed a new government, replacing Roques with Lyautey.