一、为什么要在剑南造船贞观十九年(645年),唐太宗李世民亲率大军攻打高丽,但战局进展并不顺利。攻下盖牟、辽东、白岩三城,并分别置盖州、辽州、岩州三州后,唐师 First, why should Jiannan Shipbuilding Zhenguan nineteen years (645 years), Taizong Li Shimin led an army to attack Korea, but the progress of the battle is not smooth. Captured Gaogou, Liaodong, Baiyan three cities, and were placed cover state, Liaocheng, Iwakuni three states, Tang division