Which is an example of a union strategy that took advantage of a confederate weakness

Brute force - The North had strength in numbers, this was Grant's favorite strategy, overwhelm the enemy with overwhelming numbers to match the South's lack of men in most cases. Another was the Anaconda plan, where they planned to take advantage of the South's weak navy, and use their superior naval forces to choke off the South's ports, therefore, cutting off their supply lines and trade ports, thereby cutting off the South's income as well as supply from trade.

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.