He will say to them, "Hear O Israel, you are close today to war and to your enemies ... Do not let your hearts become faint! Do not be afraid and don't be rushed, and do not become terrified before them." (Devarim 20:3)
War, for the Jewish people, is not a new thing. Since we left Egypt, we have had to do battle with almost every nation we have met. However, what has changed is the feeling of G-d fighting amongst our ranks ...
"For Hashem your G-d goes with you to do battle for you with your enemies to save you from them."
Given the miracles of Jewish survival, and the unbelievable victories against the odds, G-d certainly fights on our behalf. We may not always feel it that much, but, as we saw in 1967 (Six-Day War), and again in 1991 (Persian Gulf War), G-d is with us.
In fact, the day that Suddam Hussein finally "scudded" Israel after months of threats, and that George Bush told the Israelis not to retaliate, promising that the America people would defend Israel with Patriot missiles, was the same day that the second "aliyah" of Parshas Beshallach "chanced" along. In that aliyah (Shemos 14:9), with their backs to the sea and facing a massive and hostile Egyptian army, the Jewish people cried out to Moshe in desperation. Moshe answered them famous words, "Do not say anymore ... G-d will fight this battle for you!"
How's that for Divine Providence.
"But," you may say, "that verse is talking about a different period of history. How could we imagine G-d fighting for us today, when we are so distant from Him and barely keeping His mitzvos?!" Rashi answers that question based upon the above verse:
"Hear O Israel ... Even though you have no other merit than the fulfillment of the commandment of saying "Shema," you would still deserve that He should help you." (Rashi)
Well, that changes everything. That's all we have to do--say the Shema everyday? After all, it is only six words and fifty letters ... What does it take to say the Shema? About ten seconds, actually, if you add to it the second posuk of "Boruch Shem kevod ..."
Perhaps. And then perhaps, there is more, for, incorporated into those six words is everything a Jew ought to know about living in This World, especially when it comes to going to war.
"Hear O Israel, the L-rd Our G-d, the L-rd is One," means, in short, that no one has power in creation but G-d Himself, even our enemies: All the forces in creation come down to one Force, the Force, G-d Himself. So, why then do our "enemies" seem so powerful, and so angry, and so willing to do us harm ... and so capable of fulfilling their will? Because, says the Shema, we believe they are ... which is why we come to fear them more than G-d in the first place.
That's a no-no.
However, for one who recites the Shema with the proper understanding and intention of, "Ain Od Milvado"--there is none other besides Him--then G-d will fight his battles for him, on a personal level and a national level. Furthermore, it will be clear that this is the case, because the miracles will be obvious enough to him/them to prove the point--even if others don't concur (many people weren't impressed in 1991 with the Beshallach connection).
Therefore, when it is all said and done, the Shema may consist of only six words and fifty letters, but, they are a story unto themselves--the entire story unto themselves.