Louis Félix Thomas Maurin (5 January 1869 – 6 June 1956) was a French army general who was twice Minister of War in the 1930s. Before and during World War I (1914–18) he was a strong advocate of motorization. In the inter-war period from 1919 to 1939 he advocated a policy of passive defense against the growing German threat. He thought that with all the money that had been spent on the Maginot Line fortifications it would be madness to go on the offensive. He saw little value in tanks as a weapon. He advised against a limited military reaction when Germany reoccupied the Rhineland in March 1936, calling for general mobilization or nothing. He did not consider that the 1936 pact with Russia would help France militarily.
Early years
Louis Félix Thomas Maurin was born in Cherbourg on 5 January 1869. He graduated from the École Polytechnique and joined the army, where he made his career in the artillery. In 1899 Maurin and Maurice Gamelin were fellow students at the École de Guerre. Maurin married Anne-Marie Bigault. Their son, Philippe Maurin (born 13 December 1913), would become an Air Force general.

Maurin was involved in motorization for almost twenty years. He was described by one general as "an apostle of motorization." During World War I (1914–18) both Maurin and Gamelin were "special envoys" of Joseph Joffre in 1914. Maurin later served on the staff of General Joseph Gallieni. He was appointed Brigadier General in 1918. In 1918 Maurin was in command of the General Reserve of Artillery. Motor transport was widely used by the Reserve to move artillery units between sectors of front.

Post-war army
Maurin became second in command of the French Army general staff in 1920. Maurin was Inspector General of Artillery from 1922 to 1934. From 1927 he was also Inspector General for Motorization of the Army. In October 1927 Maurin and two other officers advocated that the planned Maginot Line of defenses include a double line of machine gun placements. He was overruled in favor of the palm fort design, which was supported by Philippe Pétain.

Maurin represented France in Poland at the tenth anniversary of Polish independence, and presented a Consular saber to Chief of State Józef Piłsudski. When General Marie-Eugène Debeney retired as Chief of Staff in 1928, Maurin and Maxime Weygand were proposed as replacements. Pétain objected to Maurin, while the Minister of War Paul Painlevé objected to Weygand. Eventually Weygand was given the post in 1930.
Minister of War
Maurin was Minister of War from November 1934 to June 1935. He said in a debate in March 1934 that in the event of war France would not go on the offensive after having spent billions on fortifications. It would be insane to risk an advance in front of that barrier. He became a member of the Conseil supérieur de la guerre (Supreme War Council) in 1935. Maurin wrote that in April 1935, a month after Germany had reestablished a conscript army in violation of the Treaty of Versailles,
In January 1936 Maurin was appointed Minister of War in the cabinet of Albert Sarraut. The Minister of Foreign Affairs, Pierre-Étienne Flandin, wanted to obtain agreement from Britain for support in the event of a military confrontation with Germany, but Maurin refused to provide details of the action France proposed to take. The British Foreign Secretary, Anthony Eden, took the lack of firm commitments as evidence that France was looking for an excuse to avoid using force against Germany. When the Franco-Soviet Treaty of Mutual Assistance was ratified in February 1936 Maurin told the Council of Ministers that the alliance would have no military value to France.





