Correct

开战

/ kāizhàn /
Strokes

Definition

to start a war/to make war/to battle against

Example

As a Verb

make/wage/levy war (up) on/against; open a war with; wage a battle

1
Chóngxīn
重新
kāizhàn
开战

renew a war

2
Xiàng
rén
敌人
kāizhàn
开战

make war on the enemy

As a Verb

battle (against nature, conservative forces, etc)

3
Xiàng
bài
腐败
xiànxiàng
现象
kāizhàn
开战

battle against corruption; combat/fight corruption