Foreign nationals who live abroad will be eligible to join the armed forces, as British residency requirements for service are scrapped.
The Ministry of Defence has removed the need for Commonwealth citizens to have lived in the UK for five years before applying for service, ministers announced on Monday.
The military hopes to recruit 1,350 extra personnel from overseas every year to the Navy, Army and Air Force.
It comes as the armed forces are struggling to recruit enough servicemen and women to fill a shortfall in their ranks.
In April, a National Audit Office report said the full-time military was running at a 5.7% shortfall.
A further 8,200 regulars and 2,400 engineers were needed to fill the “largest gap in a decade”, the report added, while intelligence analysts and pilots were also in
Applicants from countries including India, Australia, Canada and Fiji will be considered for all roles in the forces, without having lived in the UK.
The army will begin the admissions from early next year, while the Navy and RAF will begin the process immediately.