A.1. Yes, a belligerent nation or state is warlike because belligerent means aggressive and a aggressive nation is likely to be warlike.
2. Yes, rebelliousness refers to showing desire to resist control.
3. Rebellion is the action of resisting authority, control, or convention.
4. Yes, a bellicose nation is likely to go to war because it exhibits aggression and willingness to fight.
5. Yes, Antebellum plantations were built before Civil war
B.
1. Rebels
2. rebellions
3. antebellum
4. belligerence
5. rebelliousness
These are probably the answers though I am not 100% sure.
The first blank is protagonist, the second blank is antagonist, and finally the third blank is secondary character.