Complex sentence: The majority of Hernán Cortés's troops during his campaigns in the New World were rodeleros: in 1520, over 1000 of his 1300 men were so equipped, and in 1521 he had 700 rodeleros, but only 118 arquebusiers and crossbowmen.
Split into simpler sentences: The majority of Hernán Cortés's troops during his campaigns in the New World were rodeleros. In 1520, over 1000 of his 1300 men were so equipped, and in 1521 he had 700 rodeleros, but only 118 arquebusiers and crossbowmen.