Introduction: The national assembly of France was formed in 1789, after the French Revolution, to create a new constitution for the country. However, the assembly faced opposition from neighboring countries like Prussia and Austria.

Reasons for the attack:

1. Fear of foreign intervention: The French Revolution had created a wave of nationalism in France, and the national assembly feared that other countries might intervene to suppress the revolution. Prussia and Austria were both monarchies, and their rulers felt threatened by the ideas of the revolution. As a result, they formed a coalition to invade France and restore the old order.

2. Declaration of war: In April 1792, the national assembly declared war on Austria after the French army suffered a defeat in Belgium. The French believed that Austria was responsible for the defeat and wanted to take revenge.

3. Desire for territorial expansion: The national assembly also had a desire for territorial expansion, and they believed that invading Prussia and Austria would give them a chance to expand their borders. They hoped to spread the revolution to other countries and create a new European order based on liberty, equality, and fraternity.

4. Preemptive strike: The national assembly feared that if they did not attack Prussia and Austria, these countries would attack France. They believed that a preemptive strike would give them an advantage in the war and prevent their enemies from gaining the upper hand.

Conclusion: The attack on Prussia and Austria was a result of several factors, including fear of foreign intervention, desire for territorial expansion, and a preemptive strike. However, the war ended in a stalemate, and France faced continued opposition from other European countries. The attack also had a significant impact on the course of the revolution, leading to the rise of radical factions and the Reign of Terror.

The National Assembly attacked Prussia and Austria as their kings were supporting Louis XVI to slow down or stop revolutions occuring in France as this would then spread in whole Europe and they would lose their power as then whoke Europe would demand for abolishing monarchy.