The answer is: Support for constitutionalism increased, while the power of monarchies decreased.
Constitutionalism is concept that propose the power of the government should be limited and all government officials should be subjected to the same law like the citizens.
This concept would definitely reduce the power of monarchies since they can be held responsible for all their wrong doings while giving more power to the people.
The Romans were well known for their ever-adapting military machine. They would adapt the useful things from certain nations they conquered and would take out the ones they didn't consider to be useful from their own military structure. This enabled the Roman conquesting force a good portion of flexibility through time.
<u>Answer:</u> Neutral Proclamation or declaring the U.S. to be "friendly and impartial" toward both warring powers