This image is used to emphasize helping the needy. Disaster relief is one way an army of humans helps to relieve suffering.
Almighty God does not need an army to defend Him. God’s army defends the weak and relieves suffering. God Himself needs no defense.
In God’s Kingdom the innocent are defended, the needy receive help, orphans and widows are supported. All work to relieve human suffering is the work of His Kingdom.
The folly of Christian scholars has been the defense of doctrines at the expense of human suffering.
The Word in Vision 