What event prompted the persian gulf war?

It was the invasion of Kuwait by Iraq that prompted the Persian Gulf War, since this was a blatant violation of a sovereign country by another. The United States "led the charge". 

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.