During the French Revolution, the proclamation of the abolition of the monarchy (French: Proclamation de l'abolition de la royaute) was a proclamation by the National Convention of France announcing that it had abolished the French monarchy on 21 September 1792.

France on 21st September, 1792 was declared a Republic. This significant event marked a turning point in the French Revolution, as it abolished the monarchy and established a new political system.

Background:
The French Revolution was a period of radical social and political upheaval in France that lasted from 1789 to 1799. It was fueled by a combination of economic hardships, social inequality, and political discontent. The revolution aimed to overthrow the absolutist monarchy and establish a more egalitarian and representative government.

The French Revolution:
The French Revolution began in 1789 with the storming of the Bastille, a notorious prison in Paris, and the revolt spread throughout France. The revolutionaries, inspired by Enlightenment ideas, sought to create a society based on the principles of liberty, equality, and fraternity.

Establishment of the Republic:
On 10th August 1792, the monarchy was overthrown and King Louis XVI was imprisoned. This event marked the end of the constitutional monarchy and the beginning of the French Republic. However, it was on 21st September 1792 that the National Convention, a revolutionary assembly, officially declared France a Republic.

Impact:
The establishment of the Republic had significant implications for France and the course of the French Revolution. It symbolized the triumph of the revolutionaries and the rejection of the old order. The monarchy, which had been a symbol of absolute power and privilege, was abolished, and the power was transferred to the people.

Political Changes:
With the declaration of the Republic, the political landscape of France underwent a drastic transformation. The National Convention became the governing body, and a new constitution was drafted in 1793. The revolutionaries aimed to create a republican government based on democratic principles and universal suffrage.

Continued Unrest:
However, the establishment of the Republic did not bring an end to the revolutionary fervor. France continued to face internal and external challenges, including the Reign of Terror and the ongoing war with other European powers. The Republic faced numerous political and social upheavals until the rise of Napoleon Bonaparte in 1799.

In conclusion, France on 21st September, 1792 was declared a Republic, marking a significant shift in the political structure of the country. This event was a crucial milestone in the French Revolution and represented the triumph of the revolutionaries' ideals of liberty, equality, and fraternity.