What explains the high number of casualties the british suffered in their campaign against concord?

The high casualties incurred by the British army at Concord can be attributed to the use of guerrilla tactics by colonial militiamen. Instead of coming out to face the British head-on in the traditional massed battles for which the British had trained and schemed, the colonial militias used hit-and-run tactics along the way to Concord, striking quickly, inflicting casualties, and disappearing before the formed British troops could react.

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.