The Evzones, or Evzoni, (Greek: Εύζωνες, Εύζωνοι) is the name of several historical elite light infantry and mountain units of the Greek Army. Today, it refers to the members of the Proedriki Froura (Presidential Guard), an elite ceremonial unit that guards the Greek Tomb of the Unknown Soldier (Άγνωστος Στρατιώτης) and the Presidential Mansion. The Evzones are also known, colloquially, as Tsoliades (Greek: Τσολιάδες; singular: Τσολιάς - Tsolias).

Though the Presidential Guard is a predominantly ceremonial unit, all Evzones are volunteers drawn from the Hellenic Army's Infantry, Artillery and Armoured Corps. Prospective Evzones are usually identified at the Army Recruit Training Centres during Basic Training; there is a minimum height requirement of 1.86 meters to join, and the soldier must serve a minimum of 6 months with an operational Army unit before beginning Evzone training.

The unit is famous around the world for its unique traditional uniform, which has evolved from the clothes worn by the klephts who fought the Ottoman occupation of Greece. The most visible item of this uniform is the fustanella, a kilt-like garment. Their proven valour and peculiar dress turned them into a popular image for the Greek soldier, especially among foreigners.

The Tomb of the Unknown Soldier refers to a grave in which the remains of an unidentified soldier are interred, dedicated to the common memories of all soldiers killed in any war. Such tombs can be found in many nations and are usually high-profile national monuments. Throughout history, many soldiers have died in wars without their remains being identified. Following the First World War, a movement arose to commemorate these soldiers with a single tomb, containing the body of one such unidentified soldier.

During the First World War, the British and French armies jointly decided to bury soldiers themselves in the form normally associated with religion.^[vague] In Britain, under the Imperial War Graves Commission, Reverend David Railton had seen a grave marked by a rough cross while serving in the British Army as a chaplain on the Western Front, which bore the pencil-written legend "An Unknown British Soldier". He suggested (together with the French in their own country) the creation at a national level of a symbolic funeral and burial of an "Unknown Warrior", proposing that the grave should in Britain include a national monument in the form of what is usually, but not in this particular case, a headstone. The idea received the support of the Dean of Westminster and later from King George V, responding to a wave of public support.^{[citation needed]} At the same time, there was a similar undertaking in France, where the idea was debated and agreed upon in Parliament.