Castles with citadels

Castles with citadels cling onto the cliff tops
Bulwark with bastilles 
with parapet support props
earthwork embankments
with garrison and grip
safety and secureness
from seafarers in ship 
Battlements of bastions
strengthening the stockade
Reinforcements of soldiers
blocking the barricade

Warfares of weaponry
betwixt fortification
Aegis with resistance
deterrence and protection
Grenades with gunpowder
An arsenal of ammos
Torpedos and missiles
safeguarding in shadows
Deep dikes and tall towers
armament from antagonist
Self-defense and salvation
In the worrying wee small hours