UK Military law covers many "civil" offences including theft;
"A military criminal conduct offence covers any activity recognised as an offence under civilian criminal law in England and Wales, for example, theft, grievous bodily harm, common assault or battery. These offences are all considered charged in the service justice system as an offence against section 42 of the Armed Forces Act 2006. This covers two types of offences:
Source;
HM_Forces_-_Criminality_v1.0.pdf (publishing.service.gov.uk)