Khora Rise Of An Empire BordspelIncrease power in your city state! In ancient Greece, city states (also called Polis) competed for wealth and power. They drew strength and resources from their Khra: the surrounding countryside. As the leader of your city state, you must develop the economy, culture, and your military as you send your army troops out to explore and conquer. Take advantage of your strengths to attract more residents, raise taxes, recruit military troops and gain