Sometimes bodies are so badly mutilated and burned that many fallen soldiers remain unidentified.
Today, there are many such memorials around the world.
They are called Tomb of the Unknown Soldier.
Here are some selected Tombs of the Unknown Soldier from around the world.
The tomb was unveiled in November 11, 1921.
To serve as a Tomb Guard is considered one of the highest honors.
The tomb is guarded all round the clock, no matter what the weather is.
The monument was unveiled on 11 November 1922.
The memorial holds the remains of an unidentified Canadian soldier who died in France during World War I.
The monument is a magnificent hollow pyramid, 36 meters tall and made of concrete.
At the center of the base is a solid basalt cube representing the soldier’s tomb.
The Monument represents a traditional shield dropping from the dying grasp of an Iraqi warrior.
The shield hangs over a cube made from layers of metal.
It contains the body of an unknown soldier killed during World War I.
Members of Evzones, the historic elite members of the Greek Army are stationed in front of it.
