John K. Mahon and Romana Danysh

Summary

John K. Mahon and Romana Danysh CMH 60-3: Infantry, Part I: Regular Army…

They were simply composed of men picked for their strength and courage. The truth is that conditions in America did not favor the specialization of particular companies. Indian wars had to be fought by whatever troops were available; there was no time to await the arrival of elite corps, whether called grenadiers or something else. Nor did fights with Indians give much opportunity for infantry to assume the formal line of battle with light units out front. Finally, the scattering of the companies of Regular regiments made specialized training impossible.
Source: Wikisource

John K. Mahon and Romana Danysh CMH 60-3: Infantry, Part I: Regular Army…

What is more, militia training differed widely from state to state, so that it was hard to fuse units from the several states into one army. When obliged to wage war as a nation, the United States was caught between the fear of a standing army and the inadequacies of a militia controlled by the several states. Some sort of compromise was necessary, and that proved to be an old type, volunteer soldiers organized into provisional wartime regiments.
Source: Wikisource

John K. Mahon and Romana Danysh CMH 60-3: Infantry, Part I: Regular Army…

In the Mexican War, most volunteers reached the seat of war with little or no training; but some of them, once arrived, were associated with Regular brigades and quickly introduced to the Army drill. Like the training, the organization of citizen soldiers of all types was required by law to conform to the United States' standards, but much latitude existed. The Maryland and District of Columbia Battalion of the Mexican War, for example, reached the combat area with only one field officer of the three required in the Regular service.
Source: Wikisource

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