What does President McKinley describe (or allude to) are the long term causes contributing to American entrance into the war?

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.

Where are the following

The 13th amendment explicitly banned slavery and involuntary servitude in the united states.