A war...
One eager to fight; "aggressive acts against another country"; "a belligerent tone"
Because they were drafted.
Recruits
I would say if a country has a defensive treaty alliance with another country it would mean that they would not fight with that country, but also that if the country they had the alliance with were to be attacked by another country that they would help to defend them.
Soldiers who fight in any country's army for pay are called soldiers of fortune or mercinaries.
Retaliatory.
A guerrilla is an irregular fighter, who fight against his own goverment. A partisan is an irregular soldier, who fight against regular troups from another country in his own country.
He believed no country should invade another country.
It is called a civil war.
Civil War
They are called “patriot “ because they are fighting for independence from the king.
Yes, King Alfred the great did fight the Vikings, he did not lose, but he could not get, the Vikings out the country, so he just pushed them up to, a part of the country called, Danelaw. So he did fight the Vikings, yes.