In June 18, President Trump directed the Pentagon to create a Space Force. But only Congress has the authority to reorganize or create a military service. The Space Force decision will be made after deliberations by the Pentagon, Congress and other stakeholders separately and jointly.
This monumental reorganization of the military space enterprise would begin to yield benefits in the 2040s. That would be fine, as good things are worth the wait, provided no seriously bad event happens before then. Unfortunately, the threat of a space Pearl Harbor will emerge stealthily in the early 2020s in the guise of dual-use spacecraft for which we are ill-prepared. If we do not deter this devastating threat of the 2020s, the well-intentioned Space Force of the 2040s would be too little too late.