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Well first you'd have to know how to march, or at least the tune used for marching. I'm fresh out of bootcamp, so coming from someone who just spent 2 1/2 months marching, it's usually a pentatonic scale in a 1-2 manner, going up to 4. That's just a standard marching tune, there are cadences you sing, too, each syllable is a step(Or two syllables, depending on the word. There's a cadance that goes "Momma' and Papa were lying in bed..." where 'momma' would be a step on oyur left foot, regardless of the two syllables, while the word 'And' would be the right foot).

Your current tabs wont' do that, sad to say. If I were to make a 'marching tune' I'd first learn the cadences, and then use the tunes to make your own songs and stuff. Being on a Naval base where there are Marines, Air Force, Army and Navy personell stationed that's easy for me to say because I get to listen to it day-in and day-out. But it may be best to find some cadences to listen to online, maybe, and find which tunes you like. There are a lot in the Blues-stylization of music while there are a lot of rock-oriented cadences as well. that's usually what the cadences tend to be in is either blues or rock, which is perfect if that's the kinda' music you listen to.

But if you want a the typical marching tune, like the drum-beat, bass-and-snare then you're gonna' want two guitars... and the patience to put together a very boring tune...