Success of War

In the war with Amalek, it says that Yehoshua weakened Amalek and its people לפי חרב, with the sword’s blade.

R' Yosef Tzvi Dushinsky explained the words לפי חרב that the mouth (פי can refer to the mouth) was the sword. That is to say, their Torah and tefilla, which is done with the mouth, is what determines the success of a war.

Let us take these words to heart in light of the situation the Jewish people currently find themselves in.