Answer: enemylines

AnswerCrossword Clue
ENEMYLINESIt's dangerous to be behind them
ENEMYLINESFront borders
ENEMYLINESThey may be crossed in battle
ENEMYLINESMoles may cross them
ENEMYLINESInfiltration destinations
ENEMYLINESHostile territory is behind them
ENEMYLINESMoles go behind them
ENEMYLINESA spy will often cross them
ENEMYLINESDangerous thing to cross