The loss of human lives in the years of the First World War, unheard of until then, was enormous. Romania lost almost one million soldiers and civilians. That is why the survivors had a moral duty to commemorate the ones who perished on the battlefields each year. At a national level, this was established by the Treaty of Versailles. This document, signed by the countries that took part in this war, stipulated, among others, the obligation of looking after the tombs of the soldiers buried on the territories of those countries and the commemorative works of art dedicated to them.

The materialization of the stipulations in the Versailles Treaty took place with the Decree of Law no. 169/ 4th of May 1920, that established that the Heroes' Commemorative Day should be celebrated on the occasion of the Ascension of the Lord Jesus Christ. Thus Romania became the first country that assimilated the foreign heroes to the national ones. This day was declared national holiday of the Romanian people, and an important role was played by the Society "Tombs of the Heroes Fallen in the War" (founded in 1919) and transformed at a later date into the Society "Heroes' Cult". Thanks to this organisation, under Queen Marie's high protectorate, The Unknown Hero's Tomb was inaugurated in 1923, placed in front of the National Military Museum in Carol Park.

The Society "Heroes' Cult", that changed its name to "Queen Marie National Seed" on the 1st of August 1940, had a prestigious activity. Starting with the patriotic and civic feeling of honouring the deeds of national heroism, manifested by making Heroes' Commemorative Day official, during the years between the two World Wars many monuments and commemorative tablets were built in almost all the towns. By the Decree no. 71/ 1947, for understandable political reasons, the Heroes' Commemorative Day started to be celebrated on the 9th of May, abolishing all the former provisions. The Decree no. 117/1975, concerning the regime of tombs and commemorative monuments, kept the decision that the 9th of May should be considered the Heroes' Commemorative Day and also celebrating the Day of "Romania's State Independence and Victory over Fascism".

Starting with 1990, the Ministry of National Defence launched a massive reparatory action of reintroduction the valuable Romanian military traditions into the army. From this year on, the Heroes' Commemorative Day was not celebrated on the 9th of May, but on The Ascension of the Lord. In 1995, the Law no. 48 concerning the proclamation of Heroes' Day was set. And by means of the Law no. 379/2003 concerning the regime of tombs and commemorative works of art of war, a larger expansion of the manifestation and preoccupations specific to the promotion of heroes' cult is made. Article 39 of this law stipulates, as it was natural, the celebration of Heroes' Commemorative Day on the occasion of the Ascension of Our Lord Jesus Christ.