theater commanders  

Samuel Morse

telegraph

Manassas (1st Battle of Bull Run) June 1861

Bureau of Military Information

Secret Service Bureau

Secret Field Police—Geheime Feldpolizei

William Steiber

“Green House”

IIIb

OKW–Oberkommando der Wehrmacht

Abwehr

ONI–Office of Naval Intelligence

MID–Military Information Division

interagency rivalry

Garnet Wolseley

War Office Intelligence Branch 1873

British Admiralty Naval Intelligence Department (NID) 1887

military attachés

Senior Naval Lord

First Lord of the Admiralty

DNI (Director of Naval Intelligence)

Edward Inglefield

Dreadnaught

fleet stations

station commander-in-chief

strategic cables

Sir John Fisher

“flaming datum”

communications grid

information-communications nexus

“strategic situation awareness”  

Security Service MI5

Secret Intelligence Service (SIS) MI6

Committee of Imperial Defence (CID)

invasion literature 

The Battle of Dorking (1871) by George Tomkyns Chesneya

Dracula (1897)  Bram Stocker 

War of the Worlds (1898) H. G. Wells

William Le Queux:  The Great War in England in 1897 (1894)
                             The Invasion of 1910 (1906)  
                             Spies for the Kaiser (1909)

MO5 (1899)

James Edmonds, Lt. Colonel

Vernon Kell, Captain (“K”)

Official Secrets Act (1889)
Official Secrets Act (1911)

Special Alien Reports