Yeah the Rebbe created it to solve a chinuch problem today:
In the past, people loved in an environment where you did what you were told or else… Especially under the governments of old. So the chinuch for children of doing Torah and Mitzvos no matter what you feel like doing, was accepted.
Today, especially in America, it’s not like that. There’s very much an atmosphere of no one can force me to do anything I don’t want, and if children are forced, many times they reject it when they’re older.
But since the foundation of avodas Hashem is kabbolas ol, how do we give this over in a way the children will appreciate?
Enter the Rebbe’s brainstorm, Tzivos Hashem. The children accept upon themselves the yoke of listening to their Commander in Chief, Hashem, and the more missions they fulfill, the higher they rise in rank in Hashem’s army…