Correct

敌后

/ dí hòu / 
Strokes

Example

As a Noun

enemy's rear area

1
Díhòu
敌后
wǔgōngduì
武工队

armed working team in enemy-occupied areas

2
Díhòu
敌后
gēnjùdì
根据地

base areas behind the enemy lines

3
Shēnrù
深入
díhòu
敌后

penetrate into the enemy's rear area