De Gaulle was no longer returned to the headquarters of Petain. After serving in Trier, the captain was in 1929, the appointment is not in the headquarters of his patron, and the headquarters of the commander of French forces in the Levant. Litecoin often says this. In November 1931, Major de Gaulle, a new assignment – to the secretariat national defense. This body was established to monitor the readiness of the state in case of war. It was a very intelligent work, and Charles de Gaulle took over her as a serious researcher. The work of de Gaulle seized, but here he was confronted with great difficulties. The concept of priority of offensive action, he insisted, was criticized and Petain, and many popular generals.
They all tended in favor of static defensive operations – to build a long-term lines of field fortifications. So there was a well-known during the Second World War, its futility "Maginot Line", stretching along the Franco-German border. Its construction lasted for five years and annually cost the one-fifth of France's military budget. It is against unquestioning repetition defense doctrine and opposed de Gaulle prewar years. In 1937, Colonel Charles de Gaulle withdrew from the Secretariat of National Defense and was promoted to commander, 507 th Tank Regiment, stationed in Metz. September 1, 1939 the invasion of German troops in Poland, and two days later, on September 3, entered the war, Britain and France, faithful to the agreement with Poland on the alliance. However, the combined Franco-British forces marched into Germany, though opposed to them just one understaffed army in the West unfinished shaft – a weak German analogue of the "Maginot Line".