Term | Explanation |
| Eagle's Nest | Name given to Hitler's mountain-top home at Berchtesgaden in the Bavarian Alps. |
| EAM/ELAS | The Greek Resistance. |
| Einsatzgruppen | German death-squads operating in occupied territories and carrying out mass-murders. |
| Elektra | A German radio-navigational system. |
| Enigma | German message encryption equipment. |
| ENSA | Entertainments National Service Association - UK organisation for entertaining troops abroad.. |
| Etappendienst | German naval intelligence department. |
| ETO | European Theatre of Operations. |
| Eureka | Code name for the Allied conference in Teheran Nov/Dec 1943. |