Complex sentence: In 1939 the brigade was a second line Territorial Army formation and a duplicate of 154 Infarntry Brigadeitially the brigade belonged to the 9th (Highland) Infantry Division from 1939 to 1940.
Split into simpler sentences: In 1939 the brigade was a second line Territorial Army formation and a duplicate of 154 Infantry Brigade. Initially the brigade belonged to the 9th (Highland) Infantry Division from 1939 to 1940.