Complex sentence: It was the RAC's southernmost outpost and operated from 1812 to 1841, and was established as an agricultural base for supplying the northern settlements with food as well as for conducting trade with Alta California.
Split into simpler sentences: It was the RAC's southernmost outpost and operated from 1812 to 1841. Its was established as an agricultural base for supplying the northern settlements with food and also for conducting trade with Alta California.