Killed in action is a casualty classification generally used by militaries to describe the deaths of their personnel at the hands of enemy or hostile forces at the moment of action. The United States
The Normandy American Cemetery and Memorial, near Colleville-sur-Mer, Normandy, France
Missing in action is a casualty classification assigned to combatants, military chaplains, combat medics, and prisoners of war who are reported missing during wartime or ceasefire. They may have been
Killed in action
…which occur after medical evacuation. PKIA means presumed killed in action. This term is used when personnel are lost in battle, initially listed missing in action (MIA), but after not being found, are later presumed to have not survived. This is typical of naval battles or engagements in other hostile environments…
Grave of an unknown British combatant, killed in 1943 during the Battle of Leros. Because his identity is unknown, he is missing in action.
Grave of 12 unknown British and/or Commonwealth soldiers. Buried in Stanley Military Cemetery, Hong Kong.
The Garden of the Missing in Action in the National Military and Police Cemetery in Mount Herzl in Jerusalem.
Grave of an unknown American combatant in Oise-Aisne Cemetery. Killed in 1917