Black Labrador Treo, eight, was awarded the Dickin Medal at the event at the Imperial War Museum in London.
The now retired dog, from 104 Military Working Dog Support Unit, North Luffenham barracks in Rutland, twice found hidden bombs in Helmand province.
Treo is the 63rd animal to receive the medal created by veterinary charity the PDSA to honour gallantry in war.
The medal, which is the highest accolade a military animal can be awarded, was presented by Princess Alexandra.
A total of 26 other dogs, 32 World War II messenger pigeons, three horses and one cat have won the award, introduced in 1943 by Maria Dickin, the founder of the PDSA - People's Dispensary for Sick Animals.
Wallace S. Gibson, CPM * GIBSON MANAGEMENT GROUP, Ltd.