The Fête de la Fédération in Paris was the most prominent event of a series of spontaneous celebrations all over France: from August 1789, Fédérations appeared in towns and countryside; on 5 June 1789, with lots of individual feasts to celebrate the new state of France, a constitutional monarchy. the National Assembly approved the suggestion by the Commune de Paris to organise a "general Federation". Organised late, it was largely an improvisation. The idea was not to contest the legitimacy of the king Louis XVI, but to show the general will for stable institutions and a national reconciliation and unity. In the words of Jean Sylvain Bailly, astronomer and mayor of Paris: "We suggest that this meeting (...) be sworn on the next 14 July, which we shall all see as the time of liberty: this day shall be spent swearing to uphold and defend it". Charon, President of the Commune of Paris, stated: "French, we are free! French, we are brothers!".
Two 400 000 spectator earth steps were built on each side of the field (they remained there until the Second Empire). The Seine was crossed by a bridge of boats leading to an altar where oaths were to be sworn. The new military school was used to harbour members of the National Assembly and their families. At one end of the field, a huge tent was the king's step, and at the other end, a Triumphal Arch was built. At the centre of the field was an altar for the mass.
The feast began as early as four in the morning, under a strong rain which would last the whole day (the Journal de Paris had predicted "frequent downpours").
14 000 Federated (Fédérés) came from the province, every single National Guard unit having sent two men out of every hundred. They were ranged according to their département under 83 banners. They were brought to the place were the Bastille once stood, and went through Saint-Antoine, Saint-Denis and Saint-Honoré streets before crossing the temporary bridge and arriving at the Champ de Mars. Deputies from other nations, "Swedes, Spaniards, Polacks, Turks, Chaldeans, Greeks, and dwellers in Mesopotamia," representatives of the human race, "with three hundred drummers, twelve hundred wind-musicians, and artillery planted on height after height to boom the tidings all over France, the highest recorded triumph of the Thespian art."
A mass was celebrated by Charles Maurice de Talleyrand, bishop of Autun under the Ancien Régime. The very popular General marquis de La Fayette, as both captain of the National Guard of Paris and confident of the king, took his oath to the Constitution:
We swear forever to be faithful to the Nation, to the Law and to the King, to uphold with all our might the Constitution as decided by the National Assembly and accepted by the King, and to protect according to the laws the safety of people and properties, transit of grains and food within the kingdom, the public contributions under whatever forms they might exist, and to stay united with all the French with the indestructible bounds of brotherhood
It is noticeable that at this time, the French Constitution of 1791 was not yet written; it would only take effect in September 1791. La Fayette was followed by the President of the National Assembly. Eventually, Louis XVI took his oath
I, King of the French, I swear to use the power given to me by the constitutional law of the State, to maintain the Constitution as decided by the National Assembly and accepted by myself, and to enforce the laws.The Queen rose and showed the Dauphin, future Louis XVII, saying :
This is my son, who, like me, joins in the same sentiments.
With the permission of the National Assembly, a delegation of the United States of America, led by John Paul Jones, founder of the US Navy, joined the feast. It also included Thomas Paine, James Swan, Georges Howell, Benjamin Jarvis, Samuel Blackden, Joel Barlow and William Henry Vernon. The delegation arrived at the Champ de Mars with its flag, the first instance ever of a US flag flown outside of the USA, and was cheered by the people.
After the end of the official celebration, the day ended in a huge popular feast. It was also a symbol of the reunification of the Three Estates, after the heated Estates-General of 1789, with the Bishop (First Estate) and the King (Second Estate) blessing the people (Third Estate).
In the gardens of the Château de La Muette, a meal was offered to 22,000, before balls took place. People drank, danced, sang and toasted. The organisation went up to deciding of the price of the filles du Palais-Royal (prostitutes). The feast ended on the 18 July.
In Britain, the movement was welcomed by Prime Minister William Pitt the Younger (possibly because it was weakening his hereditary foe). His opponent, Liberal Charles Fox said before the Parliament of Westminster: "Never before was made such a great step toward freeing Humanity"