Answer:

sieges

Answer	Crossword Clue
SIEGES	Takeover attempts
SIEGES	Prolonged attacks
SIEGES	Blitzes

SIEGES	Lengthy military attacks
SIEGES	Military attacks
SIEGES	All-out attacks
SIEGES	Drawn-out war tactics
SIEGES	Military blockades
SIEGES	Lengthy assaults
SIEGES	Isolating tactics
SIEGES	Military encirclements

SIEGES	Onslaughts
SIEGES	Extended attacks
SIEGES	Fortified attacks
SIEGES	Blockades
SIEGES	General concerns
SIEGES	Persistent battles
SIEGES	Attempts to gain possession.
SIEGES	Beleaguerments.

SIEGES	Beleaguers.
SIEGES	Long, wearying times.
SIEGES	Prolonged endeavors to overcome resistance.
SIEGES	Long distressing periods.
SIEGES	Wearying times: Colloq.
SIEGES	Boring periods: Colloq.
SIEGES	Blockades.
SIEGES	Prolonged troubles.

SIEGES	Prolonged woes
SIEGES	Events at Troy and Vicksburg
SIEGES	Long, wearying periods
SIEGES	Bouts
SIEGES	Fort-capturing operations
SIEGES	Protracted battles
SIEGES	Long fights
SIEGES	Some war plans

SIEGES	Protracted campaigns
SIEGES	Drawn-out war campaigns
SIEGES	Long battles
SIEGES	Major assaults
SIEGES	Series of troubles