Tomb of the Unknown Soldier services connected with their 'monumental' graves (as presumably newly conceived, and in any case approved, by their respective armies) on Armistice Day 1920 (the burial itself taking place later in January of the following year in France). In the UK, the Tomb of the Unknown Warrior was created at Westminster Abbey, while in France "La tombe du soldat inconnu" was placed in the Arc de Triomphe. The idea of a symbolic Tomb of the Unknown Soldier then spread to other countries. In 1921, the United States unveiled its own Tomb of the Unknown Soldier, Portugal its Túmulo do Soldado Desconhecido,
In Search of the Unknown for the group to fight and find. It also includes a list of characters of various classes the group might encounter while exploring the dungeon. Also included are a number of pre-generated characters the group might use to play through the adventure. With its simple, straightforward plot and design, "In Search of the Unknown" was regarded as a good introduction to running the "D&D" game. Don Turnbull reviewed "In Search of the Unknown" in issue No. 13 of the magazine "White Dwarf" (June/July 1979), and gave the module a rating of 9 out of 10. He compared this module to