This mod incorporates structure tree changes proposed by our historian @Thorfinn the Shallow Minded: 1. Athenians can build gym since phase 2 and train champions from it, complemented by a marathon tech to speed up champions. 2. Spartans can build Military Mess Hall in phase 2 and train the champion spearman from it. 3. Macedonians can build  siege workshop in phase 2 then train siege tower and crossbow from it 4. Macedonians have access to Hetairos Companion Cavalry since ph