Question: Senjūrō Hayashi was a commander for the Chosen Army of Japan during the event that was a pretext for the invasion of what part of China?

Senjūrō Hayashi (林 銑十郎 , Hayashi Senjūrō , 23 February 1876 – 4 February 1943) was an Imperial Japanese Army commander of the Chosen Army of Japan in Korea during the Mukden Incident and the invasion of Manchuria, and a Japanese politician and the 33rd Prime Minister of Japan from 2 February 1937 to 4 June 1937. <SEP> The Mukden Incident, or Manchurian Incident, was a staged event engineered by Japanese military personnel as a pretext for the Japanese invasion in 1931 of northeastern China, known as Manchuria. <SEP> Fedor von Bock (3 December 1880 – 4 May 1945) was a German field marshal who served in the German army during the Second World War.  Bock served as the commander of Army Group North during the Invasion of Poland in 1939, commander of Army Group B during the Invasion of France in 1940, and later as the commander of Army Group Center during the attack on the Soviet Union in 1941; his final command was that of Army Group South in 1942. <SEP> Sen Soulintha, Saen Surintha or Sen Sourintha (1511–1582) was born Chane Tian and became King of Lan Xang reigning 1571-1575 and again 1580-1582.  Sen Soulintha was not of noble birth, rising from royal page to King Setthatirath’s Chief Minister.  During the succession disputes in the Kingdom of Lan Na between King Setthatirath and King Mekuti, Sen Soulintha served Setthatirath as a general and successfully took several cities of Lan Na including Chiang Saen for which he was given the honorific name "Lusai" meaning “victory.”  Sen Soulintha supported Setthatirath in leading the guerrilla campaigns during the Burmese invasions of King Bayinnaung.  When Setthatirath died near Attapeu under suspicious circumstances in 1572, Sen Soulintha led the armies of Lan Xang back to Vientiane.  A succession dispute erupted, which nearly led to civil war and provided a pretext for another Burmese invasion ordered by Bayinnaung and led by the Chief Minister Binnya Dala.  Sen Soulintha defeated the Burmese and Lan Na forces led by Binnya Dala, an event which led to the latter’s exile, only to face a more massive invasion led by Bayinnaug the following year.  Sen Soulintha again attempted to resort to guerilla tactics, but lacked popular support from his seizure of the throne.  He and his son Ong Lo (Nakhon Noi) were captured by Bayinnaung and exiled to Pegu.  The Burmese placed Setthathirath’s brother, and former "Ouphahat" or Viceroy, Prince Tha Heua on the throne.  According to the Luang Prabang chronicles it was this brother, who had led a rebellion in Luang Prabang and tried to seize the throne from Setthathirath on the death of their father Photisarath.  Prince Tha Heua took the regnal name Voravongsa and reigned under Burmese suzerainty from 1575-1579.  Voravongsa was never popular, and drowned with his family while attempting to flee Vientiane in the face of popular uprising.  In 1579, Bayinnaung dispatched a sizable army to restore order.  According to Lao histories Sen Soulintha was then installed as king a second time in 1580.  By that time Sen Soulintha was an old man and reigned only for two years before his son ascended the throne as Nakhon Noi and another succession dispute ensued.