Joel 3

3:9  Proclaim ye this among the Gentiles; Prepare war, wake up the mighty men, let all the men of war draw near; let them come up:

Prepare war

Verses 9-14 refer to Armageddon; verses 15,16 are parallel with Joel 2:30-32 . From verses 9 to 16 we have a resume of Joel 2:9-32 .