Battlefront : u - boat war commerce raiders 第二次世界大战：大西洋潜艇战长驱直进
2.
They say that the most valuable experience is that of the northern expedition of 1926 - 27 and that we must learn from it , or , to put it more concretely , that we must imitate the northern expedition in driving straight ahead to seize the big cities 他们说：一九二六年至一九二七年的北伐战争的经验是最好的，我们应该学习它，具体地说，学北伐战争的长驱直进和夺取大城市。
