This was the effort during wwii to develop the first nuclear weapons of the united states in collaboration with the u. k. and canada.

The effort from the US, UK and Canada to develop nuclear weapons was known as the Manhattan Project.

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.