On 31 August Claudel became Chief of Staff of the fortress region of Verdun and on 11 October assumed the same role in the Eastern Army Group.

Claudel held the position of second aide de camp to the General Staff of the armies of the north and north-east from 17 December 1916 to 2 May 1917.

He remained with 17th Corps beyond the end of the First World War until 1 March 1919 when he was without posting until made commander of the French Army of the East on 20 May.

He was released from this role on 8 April 1920, became a commander of the Legion of Honour on 16 June, and was without a position until 12 November when he became a member of the Advisory Committee on Colonial Defence.

He also held the Colonial Medal with clasps for Morocco 1925, Senegal, Ivory Coast, Sudan, French West Africa and Mauritania.