The Combined Military Services Museum in Maldon, Essex, was opened on 5 July 2004.

In 2007, a National Lottery grant was given to extend the museum to house the Donnington Historic Weapons Collection.

[1] Amongst the items in the museum is a Cockle Mark II canoe from the "cockleshell heroes" raid, Operation Frankton, as well as a large collection of Special Operations Executive (SOE) equipment and the Donnington Historic Weapons Collection.

These are the training records of Captain P M Riggal, an instructor in the SOE, found 50 years after the end of the Second World War.

[3] On 7 September 2016, nearly 100 artefacts from the museum's SOE and Mason collections were shipped to the Musée de l'Armée in Paris for an exhibition called "Guerres Secretes" ("Secret Wars"), to run from 12 October 2016 and to 29 January 2017.