Complex sentence: By the autumn of 1940 more than 2,000 men had volunteered and in November 1940 these new units were organised into a Special Service Brigade consisting of four battalions under the command of Brigadier J. C. Haydon.
Split into simpler sentences: By the autumn of 1940 more than 2,000 men had volunteered. In November 1940 these new units were organised into a Special Service Brigade consisting of four battalions under the command of Brigadier J. C. Haydon.