Complex sentence: Under the Spanish colonial government rules, trade was actively discouraged with non-Spanish ships and the few non-Indian people living in California had almost nothing to trade--the missions and pueblos were subsidized by the Spanish government.
Split into simpler sentences: Under the Spanish colonial government rules, trade was actively discouraged with non-Spanish ships. The few non-Indian people living in California had almost nothing to trade--the missions and pueblos were subsidized by the Spanish government.