 Armed with rifles with long bayonets attached to them, his indigenous force was trained to charge the enemy on horseback at great speed before dismounting and opening fire with their rifles.In 1814, Campbell began putting together a squadron of river vessels to support Artigas on the Paraná.In 1818 Peter Campbell took charge of the second squadron of the Uruguayan naval forces, based in Goya and Esquina, Corrientes.