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In page Brigade:

"

Until 1918, the chief of staff of a brigade was known as a brigade major. Before 1922, British Army brigades were normally commanded by general officers holding the rank of brigadier-general (equivalent to a "one-star" rank in the US Army); after that date, the brigade commander was an appointment for officers with the rank of brigadier, which were then classified as field officers not general officers. This is universally the case today.[citation needed]