And I never knew that it was a song - just looked it up myself and wow!
I copy/pasted the military history event that the song was written about... during the attack on Pearl Harbor:
"According to writer Jack S. McDowell, the famous phrase is generally credited to "a chaplain," said to be manning the guns of a ship under attack. "This was not true," says McDowell. For some time, long after Pearl Harbor, stories and reports surfaced about an incident involving this apocryphal "sky pilot", who was said to have uttered the words "Praise the Lord and pass the ammunition".
The stories eventually made their way through the servicemen and back to the press. This, as McDowell noted, led some writers to erroneously identify other chaplains as author of the phrase. Nonetheless, the real chaplain, LTJG Howell M. Forgy, was aboard the USS New Orleans during the Japanese attack.
Lieutenant Edwin F. Woodhead, who was the officer in charge of an ammunition line on the USS New Orleans later recounted that during the attack, "I heard a voice behind me saying, 'Praise the Lord and pass the ammunition.' I turned and saw Chaplain Forgy walking toward me, along the line of men. He was patting them on the back and making that remark to cheer and keep them going. I know it helped me a lot, too."
Another lieutenant said that thereafter, when the men heard the song, they would kid Chaplain Forgy about the role he played, encouraging him to set the record straight about who actually said what. According to the same officer the chaplain would decline, modestly claiming he felt, "... the episode should remain a legend, rather than be associated with any particular person." Author McDowell noted that reporters eventually were permitted to interview the men of the USS New Orleans involved in the "ammunition" story. Chaplain Forgy's superior officers set up a meeting with members of the press and at last, the real story of the song and the man who had inspired it was confirmed."
