Complex sentence: This was the first Spanish attempt to take advantage of its discovery of Strait of Magellan, and seven ships integrated the expedition, with 450 men aboard, inluding all kind of trades and administrative staff, intended to establish a permanent Spanish ruling in those lands.
Split into simpler sentences: This was the first Spanish attempt to take advantage of its discovery of Strait of Magellan. Seven ships integrated the expedition, with 450 men aboard, inluding all kind of trades and administrative staff, intended to establish a permanent Spanish ruling in those lands.