And a rebellion would be comprised of rebels, correct? From Bouvier, 'Rebel - In another sense it signifies a refusal to obey a superior, or the commands of a court.' Lincoln refused to abide by a decision of the court.
Just pondering.
Main Entry: reb·el
Pronunciation: 're-b&l
Function: adjective
Etymology: Middle English, from Old French rebelle, from Latin rebellis, from re- + bellum war, from Old Latin duellum
Date: 14th century
1 a : opposing or taking arms against a government or ruler b : of or relating to rebels
2 : DISOBEDIENT, REBELLIOUS
Jefferson Davis took up arms against the lawful government.
Just pondering.