And lost him that job, replaced by a more aggressive policy, and General Joffre.
It is not this simple.
Langlois retained a lot of influence after his membership of the CSG through his role as the main editor of the Revue militaire général from 1907 onwards. He was not invited to the
Académie Française in 1911 as a participation award.
He was proponent of decisive battles and destruction of enemy forces, critical of Séré de Rivières plan of fortifications, and preferred field fortifications instead. He also supported the focus on light artillery.
Langlois was also a strong proponent of increasing the size of the French standing army, and the Army Law of 1913 was in line with his views. He wanted to destroy the enemy army instead of focusing on capturing or defending territory.
Here diplomatic realities and politics met strategic planning. General Michel, who preceded Joffre looked the available military intelligence, and drew the following conclusions:
- Germans would seek to use the Belgian territory to full extend, since the country was militarily weak and had the best terrain for offensive warfare westwards.
- Michel predicted that the Germans would use their reserve corps to create enough forces to allow them to attempt a wide envelopment that would advance along the western side of the Maas River.
Michel held views that were against the prewar orthodoxy - that reservist formations would be unable to partake to major offensive actions at the start of a war. His recommendations of focusing on Belgium and to the plans of meeting the Germans there were also diplomatically impossible considering the treaties with Britain.
Enter Joffre, in a situation where the Russo-Japanese War and the First Balkan War seemed to confirm the ideas of the proponents of the offensive.
His plans were part of the joint Franco-Russian military planning of 1911-13, and the time when the Moroccan Crises had gradually turned revanchism and the anti-German sentiment from a niche topic to a major factor of French domestic politics.
Joffre believed the Germans would not have troops to spare to go to Belgium, and that they would invade through the Franco-German border. Joffre planned to meet and destroy them there.
Like Bonnal and Foch, Joffre planned to place the French
centre de gravité so that their deployment areas would enable the French armies to mobilize and rapidly meet the Germans in a mobile decisive battle.
tl;dr - The French strategic thinking and planning was a result of a complex combination of strategic, diplomatic and political factors as well as internal military debates.