What This Host?

What this host? This mighty army,
Conquering every prince of men?
Led by what high King, what champion?
Who, once dead, now lives again?

This, the Church, the Bride of Jesus,
Armor-clad by God’s own hand:
Shield of Faith and Sword of Spirit—
Shod by Gospel, firm to stand!

With the awesome Truth of Heaven,
Christ has girded her around,
So arrayed for every battle,
She shall pull all empires down.

Gleaming in the morning sunlight
See salvation’s helmet shine!
Trusting to that sure protection,
On she fights, renewed in mind.

O’er that heart once bound to evil,
Lies the mail of righteousness,
No satanic accusation
Can defeat such glorious dress!

Terrible in strength and valor,
Jesus leads His host to war,
His the vict’ry, His the conquest!
He has broken down Hell’s door!

Author: Unknown

The hymn is modern in language and theology (clearly drawing on the Armor of God in Ephesians 6), but no author is named in the supplied text. It does not match any well-known historic public-domain hymn; it may be a recent composition whose author is not widely credited or is simply unattributed here.