Just before the beginning of the disastrous Neapolitan War, the army was again reorganised into two field armies; King Murat's Army and the Army of the Interior (or Reserve). The 1st Infantry were one of the unlucky units chosen to join the ill-fated Field Army. Though still part of Pepe's Brigade, in Carrascosa's Division, the regiment had now expanded to 2,551 men, tho many of these "men" were untrained peasants, former prisoners, "guerrillas", or just simply not motivated.