There were two 11th Independent Mixed Brigades in the Imperial Japanese Army

Imperial Japanese Army

-Foundation:During the Meiji Restoration, the military forces loyal to the Emperor were samurai drawn primarily from the loyalist feudal domains of Satsuma and Chōshū...

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The First 11th IMB

The order of battle of the first 11th Independent Mixed Brigade in July 1937:

11th Independent Mixed Brigade

• 11th Independent Infantry Regiment
• 12th Independent Infantry Regiment
• 11th Independent Cavalry Company
• 11th Independent Field Artillery Regiment
• 12th Independent Mountain Gun Regiment
• 11th Independent Engineer Company
• 11th Independent Transport Company

This unit was involved in the Operation Chahar

Operation Chahar

Operation Chahar, known by the Japanese as チャハル作戦 and by the Chinese as the 长城抗战 , occurred in August 1937, following the Battle of Beiping-Tianjin at the beginning of the Second Sino-Japanese War....

 and soon after was recalled to Manchukuo

Manchukuo

Manchukuo or Manshū-koku was a puppet state in Manchuria and eastern Inner Mongolia, governed under a form of constitutional monarchy. The region was the historical homeland of the Manchus, who founded the Qing Empire in China...

 were it was formed into the IJA 26th Division.

The Second 11th IMB

The order of battle of the second 11th Independent Mixed Brigade, which was formed in 1939, for garrison duties in China:

11th Independent Mixed Brigade

• 46th Infantry Battalion
• 47th Infantry Battalion
• 48th Infantry Battalion
• 49th Infantry Battalion
• 50th Infantry Battalion
• 11th IMB Artillery Battalion
• 11th IMB Engineer Company
• 11th IMB Light Antiaircraft Company
• 11th IMB Signal Unit

The brigade was in the Battle of West Henan–North Hubei.