Terrible As An Army With Banners

Christ likens his Church to an Army which strikes terror into the hearts of her enemies.
What is it that makes the Church such a formidable sight and what is the effect on individuals, false systems and the Kingdom of God?
How can the Church be like this today?

I. What Makes Her A Formidable Sight
a) Her unity
b) Her armour
c) Her faith
d) Her Commander

II. The Effect of This Formidable Sight