Here's one version of Captain Jack:

Captain Jack

Hey, hey Captain Jack
Meet me down by the railroad track
With that rifle in my hand
I'm gonna be a shootin' man
A shootin' man
The best I can
For Uncle Sam

Hey, hey Captain Jack
Meet me down by the railroad track
With that knife in my hand
I'm gonna be a cuttin' man
A cuttin' man
A shootin' man
The best I can
For Uncle Sam

Hey, hey Captain Jack
Meet me down by the railroad track
With that grenade in my hand
I'm gonna be a killin' man
A killin' man
A cuttin' man
A shootin' man
The best I can
For Uncle Sam

Hey, hey Captain Jack
Meet me down by the railroad track
With that bottle in my hand
I'm gonna be a drinkin' man
A drinkin' man
A killin' man
A cuttin' man
A shootin' man
The best I can
For Uncle Sam

Hey, hey Captain Jack
Meet me down by the railroad track
With that book in my hand
I'm gonna be a studyin' man
A studyin' man
A drinkin' man
A killin' man
A cuttin' man
A shootin' man
The best I can
For Uncle Sam

http://www.gruntsmilitary.com/cadence/journal.cgi?folder=journal&next=28

-snip-

That website has a number of other cadences. Check it out!