野战，英语怎么说？造个句子！

野战
field warfare
field war

造句：
The field war has already begun.
野战已经开始了。

野战炮兵
field artillery

野战炮
field gun

例句:
1. The field artillery pounded away at the for tress.
野战炮兵连续炮击那座要塞。

2. A brigade of field artillery was waiting, limbered up.
一旅野战炮队正在待命，他们的炮都已装在前车上了。