The 'regime' group
These nouns refer to a political regime or system.
under apartheid under capitalism under communism under democracy under Labour under occupation under socialism under ... occupation under ... rule under the Lib Dems under the monarchy under the Tories
Under communism their crops were subsidized and gas cost about a dime a gallon.
The country had, in any case, been under Soviet occupation since 1945.
You do realize that under the new regime, the unemployment figures have fallen drastically?
The following are used as normal count nouns, but are always used with words which make the meaning more specific: