Noun and する verb
こうせん
学生たちは、権威に対して徹底抗戦を強いられました。
The students were forced to resist to the bitter end against authority.
We are ready to confront war, if we have to. We are going to start the resistance against your regime, confront you, and even make war.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.