Arise, O Lord, and let Thy enemies be scattered, and let all who hate Thee flee before Thy Face!
A devotion has been recommended to me to battle against the enemies of God, especially communists. In these times, I will definitely be adding this to my prayers.
For instructions and purchase options see Defenders Of The Holy Name Of God
A set of Chaplet Beads and instructions are also available at EWTN Religious Catalog