As Chiloé had been a defensive stronghold during colonial times, the Republic of Chile used Chiloé as a starting point for its territorial expansion into the southern territories. The expedition to the Straits of Magellan, that founded Fuerte Bulnes in 1843, was assembled in Chiloé. In the 1850s Chiloé was again instrumental in the logistical support of the colonization of the Llanquihue Lake, where German settlers were given land. The last major portion of Patagonia to be incorporated into Chile, Aysén was also explored and settled from Chiloé. In the colonization process of Patagonia, Chilotes immigrants constituted a large part of the work force of the livestock enterprises that were established in Patagonia between 1890 and 1950.