How was the legislative assembly replaced and what was it replaced with? A. Prussia and Austria infiltrated France and eventually reached Paris. The people of France were furious and blamed the legislative assembly. The people demanded that it be replaced by the three estates. B. After military setbacks, an uprising in Paris led to the replacement of the legislative assembly with the National Convention C. Political instability occurred when funds for the war were starting to make a dent in France's income. France then turned to Napoleon who replaced the legislative assembly with the National Convention, but ultimately he was in control of everything and decided to pull out of the war. D. Previous King of France was corresponding with Austria and Prussia. In their agreement, if France surrendered, then he would return back to power in exchange for the french army to join any battle.