Can you let me know what a detachment in Jersey might look like, numbers/command?
Based on the figures in Alamo's quoted posting above "17 officers and 570 other ranks" it looks like the detachment was a small headquarters and 3 under strength companies, assuming that the establishment of an Infantry battalion in 1919 was still the same as it was in 1914 (which was 30 Officers and 977 men split into 4 rifle companies plus a headquarter company). It is possible that the figures of 17 + 570 represented a slimmed down Regimental headquarters (CO, 2ic, Adjutant, Quartermaster) plus 3 companies each consisting of 3 platoons based on the peacetime establishment. The composition of each company would be an Officer Commanding (major), a Second in Command (Capt) and three platoon commanders (2Lt or Lt). However that supposition would take the number of officers up to 19 so perhaps a couple of platoons were commanded by sergeants or warrant officers, or less likely, a couple of company second in command posts were not filled.