We love peace and fight a______ the war.

against

We love peace and fight against the war

fight against:

对抗...

1. The extremeness of the measures to fight against crime is almost as bad as the crime itself.
对抗罪恶的措施如果太过分则几兴罪恶本身一样不好。

2. We must fight against ignorance.
我们必须和无知作战。

against
对战

against 反对