Correct

败军

/ bài jūn / 
Strokes

Example

As a Verb

cause the defeat of the military forces

1
Bài
败
jūn
军
wángguó
亡国

cause the collapse of the army and the destruction of the nation

As a Noun

defeated troops/army

2
Bàijūn
败军
kuìsǎn
溃散
le
了
  
。

The defeated troops scattered away.