Describe in detail the “reign of terror”

This was a period during the French Revolution, in which rebels of the government regulations were executed in large numbers. This dictatorial rule of the government had people killed with unfair trials.

(let me know if this is good or not)

Assemblies do not have written codes of laws. laws are matters for magistrates and courts, not assemblies. codes of law are things such as civil law, criminal law, and constitutional law. what assemblies have are procedures regarding debating, voting and other business they might carry out.  also note that rome had three assemblies: the assembly of the soldiers, the assembly of the tribes, and the plebeian councils.