'Army' in the Bible

Before Him goes the pestilence [of judgment as in Egypt],And [the burning] plague [of condemnation] follows at His feet [as in Sennacherib’s army].

The Lord God is my strength [my source of courage, my invincible army];He has made my feet [steady and sure] like hinds’ feetAnd makes me walk [forward with spiritual confidence] on my high places [of challenge and responsibility].For the choir director, on my stringed instruments.