Three 2nd Line regiments were formed in August and September 1914 at Dunkeld and Aberdeen, then they moved to Kettering, Northamptonshire and formed 2/1st Scottish Horse Mounted Brigade.
Three 2nd Line regiments were formed in August and September 1914 at Dunkeld and Aberdeen. They moved to Kettering, Northamptonshire and formed 2/1st Scottish Horse Mounted Brigade. 
