Great Tang: I Just Want to Lead the Western Campaign

I'm Qin Mingdao, eldest son of Qin Qiong, Duke of Yi of the Great Tang. I have only one thing on my mind: the western campaign.

Waiting for all the nations to pay tribute takes too long. I might as well conquer them myself while I have the chance.

But I had the whole plan figured out. How come things keep going wrong?