The force has an authorized strength level objective of 50 reserve personnel as of 2021-22, akin in size to that of a platoon-sized unit.

[3][4][5][6] At the outbreak of World War 1 in 1914 very quickly many in the Caribbean including in Montserrat mobilised.

[7] During the Soufrière Hill Eruption the RMDF along with support from mainland UK Military forces was a vital asset the response in the evacuations and Humanitarian Aid and Disaster Relief (HADR) Operations.

[11] As a British Overseas Territory (BOT), defence of Montserrat remains the responsibility of the United Kingdom.

On 5 September 2024 Governor of Montserrat announced Major General Alex turner as Honorary Colonel of RMDF.