This is a Hasidic discourse by the Rebbe, Rabbi Menachem Schneider, based on a discourse by the Miteler Rebbe (Rabbi Dovber of Lubavitch). The discourse is about a verse from Psalm 55, which relates to the celebration of the Miteler Rebbe's release from prison on the 10th of Kislev in 1826.
The Rebbe explains the concept of war and peace and the fullness of peace, when not only does the enemy not oppose, but he transforms into a friend and support.
Original speech by the Miteler Rebbe:
https://youtu.be/divL9s0ufGs
https://youtu.be/LgtcLD2o6_Y
https://youtu.be/ohx9sS8EBEc
https://youtu.be/hFR3D1rwY6E
https://youtu.be/Sv1SmGCCDuM