Disagreement

*cough*

Nan Hai Yan looked away. He didn't think about preserving the enemy's fleet, so when he attacked, he did it brutally. The end result was naturally the opponent's spaceship exploded and the debris floated on the space.

Some items were very sensitive and the risk of explosion was very great. This was why all spaceship will be equipped with energy shield to protect themselves. But even with that, the chance of being hit at some unfortunate place still exist. 

Not only that, many mecha soldiers were trained to recognize various spaceships and also mechas. This would allow them to remember the location of some relatively important points and could attack the weakness easier. 

As a star general and a great mecha fighter, Nan Hai Yan was naturally very familiar with these informations. 

So when he fought these space pirates, he was able to destroy them rather effortlessly.