In ancient Greece and Rome, military victories were commemorated with a display of captured arms and standards. A trophy (from the Greek tropaion) was originally a war memorial assembled from such items on a battlefield. The Roman triumph also displayed these items as well as cultural objects, which later came to be called war trophies. Body parts of slain enemies have sometimes served as trophies since antiquity, in a practice called human trophy collecting. The recovery of Roman eagles taken as trophies by enemy forces sometimes inspired years of added warfare.
In more recent times, it has been common for soldiers to return home with souvenirs, such as enemy weapons and flags, while larger military items captured in battle, particularly weaponry such as machine guns and artillery pieces, became the property of the state to which the soldiers responsible for the capture belonged.
In the 20th century, the victorious alliance states removed large quantities of property, including cultural objects. After the First World War, the Treaty of Versailles authorized the removal of large amounts of property from Germany, which it termed "reparations".
After the Second World War, the Potsdam Conference authorized the removal of certain property from Germany, such as the merchant marine fleet. Germany, during the war, had removed large quantities of property from the countries that it had occupied. In some cases, for example the Soviet "trophy brigades", official looting was euphemised as the taking of "trophies".
Article 56 of the Hague Convention of 1907, stated:
The property of municipalities, that of institutions dedicated to religion, charity and education, the arts and sciences, even when State property, shall be treated as private property.