Helmets were commonly of sallet type, which was favored in Spain at the time. Provincial militia served throughout the time period, mainly against rebellions. A standing army under stronger royal control was started in the later 1490s. The latter were infantry, formed in 100 man companies, and similar to the Hermanadad troops in appearance. One-third was pikemen, one-third swordsmen, and one-third crossbowmen and arquebusiers. A high proportion of this expeditionary force was crossbowmen as well, and there were still many swordsmen. The former were steadily replaced by arquebusiers. Infantry firepower was the first use of massed arquebusiers, and was the key to early Spanish success. The troops were divided into columns under "Coronels", at first of about 600 men in three squadrons. In 1505, twenty Colunelas, of one thousand to two thousand men each, in four or five "Banderas", were established. These were mostly of pikemen and arquebusiers, although included a few halberdiers, and up to about twenty percent of swordsmen. Showing in the early 1530s, these were a new step in infantry organization, for the Spanish or any other European army. They were the first large permanent infantry units, both tactically and