This is what I can make of it. It was written by Brian Warfield of the Wolfe Tones. Bits in italics are what I'm not sure of.
Regards Mick Bracken

It was back in history's page, the story's told
Of a Napper Tandy, brave and bold
With his scarlet and green, he then was seen
With his big long gun and his fighting men
And they beated? the drum, they fired their gun
And they shook the English establishment
And the lords and the peers, they then took fears
And Grattan got his Parliament

Chorus
So here's to those brave Protestant men
Who gave their lives to free our land
All the people sang their praises then
For those brave United Irishmen

In Belfast Town, there lived a man
And his name was Samuel Nielson
A minister's son, Presbyterian
That the paper called "The Northern Star"
There was Henry Joy, the green volunteers
And Thomas Russell and McCabe and McTeer
And to them was known, a man Wolfe Tone
And formed the first United Men

So you've lost your dragon's teeth, and then you'll see,
That you've sowed the seeds of bigotry
The England's fool, divide they'll rule
So they set to break the United Men
And killed them in the fields, and some in jail
And some upon the gallows high
When Willie Orr did die, his very last cry
Was unite and fight brave Irishmen

Cast dissentions to the wind, let all men lend
To the common name of an Irishman
For across history's page, to rant and rage
Then cross the pales of bigotry
There was the men of 98, though sad there fate
Lord Edward, Tone and the brothers Sheares
It was Emmett's plea in eighteen and three
When we tried to set our country free