Here goes.
Not it. Sorry. (I think I know you...=P)
Here's another verse, adding what you've gotten so far.
Of eight score men
He's one of them.
And further, one of six.
While still alive
'Til forty-five
He holds this known prefix.
Where eagles soar
He stays no more
He rests among the stars.
While once he swore,
Not now, no more.
His life is told in scars.
When patch-eyed men
Come 'round again
Their lives are in his hand.
He'll stand up strong,
Release the throng--
What's blue he does command.
In peace or war
From aft to 'fore,
Though rarely on a ship--
He knew her tale
When he set sail
Her every lurch and tip.