I don't know how many of y'all played some X-Com:UFO Defense back in the day, but I did. I loved the whole notion of you keep what you kill and get to salvage the enemies gear once you've obliterated them from the battlefield. I think an aspect of this could be applied to games like Civ, where warfare thrives on technology. In XCom, after winning battles, you could give the salvaged xeno-weaponry to your scientists who could in turn reverse engineer it and unlock access to said weapon. Civ V could introduce this in 2 ways. Anytime you win a battle (on the attack) and occupy the dead defenders' tile, if the defending unit was empowered by a technology you don't have yet, you get a random number of towards those techs. Similarly, when conquering a city which contains buildings you don't have the tech for, each said building gives you a few towards that technology. It only makes sense, the Mongols did it to the Chinese to get their artillery corps up and running. What do y'all think?