Correct

蓝军

/ lán jūn / 
Strokes

Example

As a Noun

Blue Army ［opponent in a military manoeuvre］

1
Hóngjūn
红军
duì
对
lánjūn
蓝军
fāqǐ
发起
quánmiàn
全面
jìngōng
进攻
  
。

The ‘Red Army' launched an all-out attack against the ‘Blue Army'.