This is a distribution list of officers on the active list of the Regular Army, the Royal Marines, Special Reserve, Territorial Force, Reserve of Officers and WOs Class 1, corrected to 30th June 1916, the eve of the Somme offensive. Officers up to and including Lt Col are shown in their regiments or corps (listed by battalions in the case of infantry) in order of seniority with date of rank. Colonels and above are grouped by rank, in order of seniority. RFC and RNAS officers are included as are Indian, Dominion and Colonial Army officers. Other information given includes War Office appointments and those of UK Commands (Northern, Eastern, Scottish etc), India, Dominions, Colonies and Protectorates. There is a long list of officers holding command or staff appointments at home and overseas, though specific details such as location and unit/formation identification are not given on security grounds. The index of names runs to 582 pages.