I think it's about a war of some kind. Let me explain in more detail :-
"SHIT! SHIT" - The character is scared of the prospect of war.
"I've been hiding here for a thousand years waiting for your ghost" - Some soldiers went mad during the war in the trenches, and time went past slowly, so he is waiting for the ghost of fallen soldier.
"Your life's about to flash before your eyes" - Someone is about to die
"Stand your ground, this is ancient land, I was guided here by the spirit's hand" - Again a sign that the soldier has gone mad, but could also be interpreted as an order by a General.
"We shall meet at hell's gate, this is fate" - He believes he is ready to die, and will go to hell
"Not all is lost the spirits shreik" - May be a soldier's shout to boost morale in the trenches
"You will be hunted, we shall seek perserverance" - Maybe a threat to the enemy, to hunt them down
"Turn the page, Enter Shikari, Enter Shikari" - Sending in the people to recover the dead bodies
"We're not hiding now" - The battle is over, so the soldiers need not hide
"I'm in the zone" - The character has realised that there will be no more battle, and is extremely over the moon
"And still we will be here, standing like statues" - They are paying respects to the dead.
I think it's about a war of some kind. Let me explain in more detail :-
"SHIT! SHIT" - The character is scared of the prospect of war.
"I've been hiding here for a thousand years waiting for your ghost" - Some soldiers went mad during the war in the trenches, and time went past slowly, so he is waiting for the ghost of fallen soldier.
"Your life's about to flash before your eyes" - Someone is about to die
"Stand your ground, this is ancient land, I was guided here by the spirit's hand" - Again a sign that the soldier has gone mad, but could also be interpreted as an order by a General.
"We shall meet at hell's gate, this is fate" - He believes he is ready to die, and will go to hell
"Not all is lost the spirits shreik" - May be a soldier's shout to boost morale in the trenches
"You will be hunted, we shall seek perserverance" - Maybe a threat to the enemy, to hunt them down
"Turn the page, Enter Shikari, Enter Shikari" - Sending in the people to recover the dead bodies
"We're not hiding now" - The battle is over, so the soldiers need not hide
"I'm in the zone" - The character has realised that there will be no more battle, and is extremely over the moon
"And still we will be here, standing like statues" - They are paying respects to the dead.
I hope this can make sense of the song. =]