I have a couple of questions on garrisoning units, something I've never done before: Am I right in thinking that if you have Oligarchy and Military Caste policies active, you can garrison all your cities for free with a bonus to city range attacks, culture and happiness? Can you garrison with an aircraft unit? Can obsolete units act as a garrison? My thought would be to use Scouts in every city - they wouldn't be any use attacking but if they were free you would get the bonuses mentioned above If aircraft and scouts cannot be used, what are the best units to go for? Any advice greatly received - I've never contemplated using a garrison on Civ5 before but I have the opportunity to have Oligarchy and Military Caste and wondered if the combo was worth it!