data/world/maps/campaign/imperial_campaign/descr_events(历史事件修改)
; ------------ CORE GAME EVENT --------------
event historic gunpowder_discovered 火器的出现
date 160 170 (最小发生回合/最大发生回合)
movie event/gunpowder_invented.bik
event historic mongols_invasion_warn 蒙古入侵
date 128 144
event historic world_is_round 地球是圆的(发现美洲)
date 320 328
把回合数改成2就会变成第二回合发生.因游戏一开始就已经为1回合
