The lyrics on DaughterofThree’s deviantART.

Mine eyes have seen the coming of the vampire Alucard;
He is trampling out the vintage where the lives of men are marred;
He hath loosed the fateful lightning of Sir Hellsing’s “calling card”;
His truth is marching on.
Gory! Gory! Hallelujah! Gory! Gory! Hallelujah!
Gory! Gory! Hallelujah! His truth is marching on.

I have seen him building death pyres in a hundred stake-out camps
He is praying at the altar in the midnight dews and damps;
I can see him collecting and lighting bright and brilliant lamps;
Sir Walter’s marching on.
Gory! Gory! Hallelujah! Gory! Gory! Hallelujah!
Gory! Gory! Hallelujah! Sir Walter’s marching on.

Safe within his heavy coffin, he was borne across the sea,
With a “dog” within his bosom bent on eating you and me:
As he died to make men suffer, now he lives to make men free;
While Hellsing’s marching on.
Gory! Gory! Hallelujah! Gory! Gory! Hallelujah!
Gory! Gory! Hallelujah! While Hellsing’s marching on.

I have read a fiery Gospel writ in burnished rows of steel;
“Let the warrior eat his fill, as it may well be his last meal”;
Let the hero, fond of women, drink until he’ll only reel,
Pip Bernadette’s marching on.
Gory! Gory! Hallelujah! Gory! Gory! Hallelujah!
Gory! Gory! Hallelujah! Pip Bernadette’s marching on.

She has sounded forth the trumpet that shall never call retreat;
She is sifting out the hearts of men before her judgment seat;
Oh, be swift, my soul, to flee from her! be fearful fast, my feet;
Sir Hellsing’s marching on.
Gory! Gory! Hallelujah! Gory! Gory! Hallelujah!
Gory! Gory! Hallelujah! Sir Hellsing’s marching on.

He is coming like the glory of the moon upon the wave,
He is wisdom to the stupid, he is terror to the brave;
So the world shall be his playground, and the soul of wrong his slave,
The vampire’s marching on.
Gory! Gory! Hallelujah! Gory! Gory! Hallelujah!
Gory! Gory! Hallelujah! The vampire’s marching on.