I think the answer is metal
In 1917, Germany, determined to win its war of attrition against the Allies, announced the resumption of unrestricted warfare in war-zone waters. Three days later, the United States broke diplomatic relations with Germany, and just hours after that the American liner Housatonic was sunk by a German U-boat.
Its really up to you...But a central government is when the government is controlling to unitary state while a strong government is when a federal/national government that has primacy the states/countries are primarily set up to mange the rules.
Make sense? if i did i am happy to help
if i didn't..Im sorry thats the best i can do
No because they worked tirelessly and got little in return other than the safety of the manor, instead the manor’s lord got most of the riches and lived comfortably