The names have been engraved onto the Armed Forces Memorial at the National Memorial Aboretum and were dedicated and read out during a service attended by their families.
The Staffordshire memorial is the UK's tribute to the 16,000 men and women who have been killed on duty or as a result of terrorist action since 1948.
The ceremony began at 12:00 BST.
The arboretum is at Alrewas.
The names of 12 members of the armed forces, killed on duty in the last year, have been unveiled.