This painting can be found at Holy Innocents Church in New York. The artist had just attended Mass when he noticed a young soldier kneeling at the foot of a crucifix. He was so moved that he started work on this painting.
Church Militant: God on the battlefield via the priest and the Holy Mass. The Catholic priest as warrior, and receiving the Eucharist as part of putting on the Armor of God: the Lord will fight for you; you need only be still [Ex 14:14]. We as Church need to re-learn what spiritual warfare is. The term "Church Militant" may be "unfashionable," but it is apt. St. Patrick, after all, has his famous "breastplate" prayer. Peter Kreeft recently said that we are at war for our souls.