The following comes from "Two Worlds One Chance" by Rabbi Ben Tzion Shafier. I apologize for not sharing it earlier:
Allow me to quote a story told by Rabbi Asher Wade. The story began on an army base in Berlin in 1974. Rabbi Wade, then a chaplain, befriended a Jewish American officer named Stuart. Stuart did not strike him as being a religious man, and so Rabbi Wade was surprised one day to see Stuart wearing a yarmulke [skullcap]. Upon questioning Stuart's reasons for donning this unconventional attire, Stuart told Rabbi Wade this fascinating story.
As part of our first-year studies, cadets were enrolled in a course called "History of Military Tactics and Field Strategies," taught by a three-star lieutenant general with a PhD in military strategy. The course surveyed the major battles in history, including those of the Ptolemies, the Romans, the Middle Ages, and down to the latest battles of our modem era. During the final two weeks of the course, which were devoted to reviewing the material, I raised my hand with a question.
"Why," I asked, "did we not survey any of the battles fought by the Jews, either of ancient times (i.e., Roman-Jewish wars) or of modem times (i.e., Arab-Israeli wars)?"
The normally friendly general snapped back with an order for me to see him in his office after class. Upon entering the general's office, I was ordered to close and lock the door. The general then told me that he could only answer my question in the privacy of his office.
"Do not think that the staff here at West Point has left the Jewish wars unnoticed," began the general. "We have examined and analyzed them and we do not teach them at West Point," he continued. "According to military strategy and textbook tactics, the Jews should have lost the wars. You should have been swept into the dustbin of history long ago, but you were not. You won those wars against all odds and against all military strategies and logic."
"This past year, we hired a new junior instructor. During a private staff meeting and discussion, the Arab-Israeli wars came under discussion. We puzzled at how you won those wars. Suddenly, this junior instructor chirped up and jokingly said, 'Honorable gentlemen, it seems to be quite obvious how they are winning their wars: G-d is winning their wars!' Nobody laughed. The reason is, Soldier, that it seems to be an unwritten rule around here at West Point that G-d is winning your wars, but G-d does not fit into military textbooks! You are dismissed," concluded the general.
I left the general's office. I had never been so humiliated in my life. I felt about two inches tall. "Wouldn't you know it," I said to myself, "that I would have to come to West Point and find out how great my G-d is from a nonpracticing Presbyterian three-star general."
I went back to my dorm room and dug down in my sock drawer to find that "flap of cloth" that I would throw on my head once a year. I said to myself, 'This thing is going on my head,' because I had found out, in essence, who I was and where I came from.
"These words, that 'G-d is fighting your wars,' were said not by a Jew. They weren't uttered by a rabbi. They weren't a quote from the Talmud. They were spoken by a three-star Presbyterian general!