With Christmas Day just around the corner, Armed Forces personnel in the UK and overseas have been getting into the festive spirit.
And the Royal Fleet Auxiliary Tide-class tanker RFA Tiderace and her crew have found themselves at the mercy of a very adventurous 'elf on the shelf'!
Watch: How is the military getting in the Christmas spirit?
There have been other Christmas well wishes and greetings coming from military Twitter accounts.
Here are some of the messages being sent out locally, nationally and internationally.