For the first city you found, and only the first city, natives will always forgive territory encroachment. Beware the next time you settle one of your colonists, however, since they'll take that previous territory into consideration then! Rivers give an undocumented +1 Food bonus to all non-hill grassland/marsh/plain adjacent tiles, and a +1 bonus to every other resource on any tile type. To set up trade routes just pay a visit to the Export and Import functions by clicking the Governor tab in your city. The higher your colony's rebel sentiment, the bigger the Royal Expeditionary Force (REF). Whenever a town produces 20 liberty bells, its borders expand. It expands a second time when it produces 200. Check Colonization Fans out for some pretty nifty tutorials. Most Colonization strategies still apply to Colonization II! Post 'em tips!