The Silver Lion: The Great Battle of Tong Pass

Han dynasty, August AD 211. CaoCao arrived at the front lines at Tong Pass, facing the main army of Ma Chao. His sole purpose is to eliminate the force of Xi Liang and conquer the vast area of western China. Facing a huge force at the border and short of supplies and opportunities for alliance, MaChao must overcome the biggest crisis of his life. How can you make decisions in right way? How can you find the weaknesses in Cao's incredible army? Every step you make will absolutely influence the battle's destiny. Will history be repeated? Everything is in your hands! The duel of fate is today!

http://en.wikipedia.org/wiki/Battle_of_Tong_Pass_(211)

The Silver Lion has three campaign scenarios. They usually take 40-120 minutes.

Time scale: Each Game Turn equals 3 days.
Unit scale: Each step equals 2500 men or cavalry.