Answer: SIEGE

AnswerCrossword Clue
SIEGEProlonged bout, as of illness
SIEGECampaign against Troy, e.g.
SIEGE... mentality
SIEGEProlonged campaign
SIEGELong campaign
SIEGEAttack
SIEGEMilitary blockade
SIEGELong bout
SIEGEProtracted attack
SIEGEWarfare tactic
SIEGEExtended attack
SIEGETragedy at Troy
SIEGEProtracted battle
SIEGESurrounding blockade
SIEGETactic endured by Leningrad in WWII
SIEGEProlonged blockade
SIEGEAll-out attack
SIEGEAssault
SIEGEHostile takeover
SIEGEWell-planned attack
siegethe surrounding of a fortified place to force its surrender
SIEGEMilitary assault
SIEGE1863 Vicksburg event
SIEGEAct of war
SIEGEBlockade
SIEGELeningrad endured one during WWII
SIEGERides the waves, in a way
SIEGEEncirclement
SIEGESeries of troubles
SIEGEProlonged attack
SIEGEAttack upon a city
SIEGE"Under ...." (1992 movie)
SIEGEExtensive attack
SIEGEProlonged battle
SIEGEOngoing trouble
SIEGEPersistent attack
SIEGEProlonged assault
SIEGEDrawn-out assault
SIEGEAttack from all sides
SIEGELong struggle