Almighty and most merciful Father, we humbly beseech Thee, of Thy great goodness, to restrain these immoderate rains with which we have had to contend. Grant us fair weather for Battle. Graciously hearken to us as soldiers who call upon Thee that, armed with Thy power, we may advance from victory to victory, and crush the oppression and wickedness of our enemies and establish Thy justice among men and nations.
-by Msgr. James H. O'Neill 12/8/1944 (the Chief Chaplain of the Third Army throughout the five campaigns on the Staff of General Patton)
http://www.pattonhq.com/prayer.html
BTTT!
May I add my "Amen!" to the prayer you posted?
It's perfect!