Editing Senjūrō Hayashi (section)

==Military career==
Hayashi's first major command from 1918 to 1920 was as commanding officer of the IJA 57th Infantry Regiment, followed by a time in 1921 attached to the Technical Research Headquarters and as an acting Military Investigator. From 1921 to 1923 he was the head of the Preparatory Course at the Imperial Japanese Army Academy, followed by a time attached to the [[Inspectorate General of Military Training]]. From 1923 to 1924 he was the Japanese Army Representative to the [[League of Nations]], followed by another stint attached to the Inspectorate General of Military Training from 1924 to 1925.
  
In 1925, Hayashi became the commanding Officer of the IJA 2nd Infantry Brigade. In 1926 he was made Commandant of the Tokyo Bay Fortress. In 1927, he became the Commandant of the [[Army War College (Japan)|Army War College]], followed in 1928 as Deputy Inspector-General of Military Training. Finally in 1929 he became the General Officer Commanding the [[Imperial Guards Division]].

In 1930, Lieutenant-General Senjūrō Hayashi, was made Commander in Chief of the [[Japanese Korean Army]]. On the day after the [[Mukden Incident]] on 19 September, he ordered the [[IJA 20th Division]] to split its force, forming the 39th Mixed Brigade. Acting without authorization by the [[Hirohito|Emperor]] or central government in Tokyo, Hayashi ordered the 39th Mixed Brigade to cross the [[Yalu River]] that same day into [[Manchuria]]. The Cabinet was forced to concede the point to the military afterwards and the movement of the 39th Mixed Brigade from Korea was authorized on 22 September.

Following his command in Korea, Hayashi was made [[Inspector General]] of Military Training and a member of the [[Supreme War Council (Japan)|Supreme War Council]] from 1932 to 1934. In 1932, he was awarded with the [[Order of the Sacred Treasure]] (1st class) and in 1934, he was awarded the [[Order of the Rising Sun]] (1st class).