Federalist No. 29

In this essay, Hamilton clearly states that it requires no skill in the science of war to discern that uniformity in the organization and discipline of the militia would be attended with the most beneficial effects, whenever they were called into service for the public defense as a militia under a union could be much better governed and aligned than one split between the states of a confederacy.

Furthermore, if a well-regulated militia be the most natural defense of a free country, it ought certainly to be under the regulation and at the disposal of that body which is constituted the guardian of the national security. Plus, if the federal government can command the aid of the militia in those emergencies which call for the military arm in support of the civil magistrate, it can the better dispense with the employment of a different kind of force.

With respect to the subject of a standing militia, the attention of the government ought particularly to be directed to the formation of a select corps of moderate extent, upon such principles as will really fit them for service in case of need. By thus circumscribing the plan, it will be possible to have an excellent body of well-trained militia, ready to take the field whenever the defense of the State shall
require it

And to those who object the concept of a standing militia, Hamilton poses the question of where in the name of common-sense, are our fears to end if we may not trust our sons, our brothers, our neighbours, our fellow-citizens? What shadow of danger can there be from men who are daily mingling with the rest of their countrymen and
who participate with them in the same feelings, sentiments, habits and interests
? It’s a good question!