The Long Patrol (Redwall)

Damug Warfang, head of a thousand Rapscallions - the deadliest horde of foebeasts ever to jump from ship to store - is looking for slaughter and plunder. Can any beast stand against the conqueror and his savage troops? Tammo's dream comes true when he is given the chance to run with the Long Patrol, the legendary fighting hares of Salamandastron...