Regarding Crossmaglen - Newry Town as I know it - the song was written by Joe Mulheron of People of No Property (Men of No Property before they became politically correct)- words I got from Joe's singing below, as I remember them:

As I came down by Newry Town,
A bunch of young men saw.
It was the first battalion
Of the men from South Armagh.

CHORUS: With biddy-i-o and a fother and a do
And a biddy-i-o-i-ay.

O have you crossed the border?
And have you come that far?
Did you see the Paras on the road?
Were they in armoured cars? CHORUS

Yes, I have crossed the border, lads.
I have come that far.
I saw the Paras on the road.
They were in two armoured cars. CHORUS

"If this be true," the leader cried,
"It's here we'll make our stand."
McVenny gave the order
With a Thompson in his hand. CHORUS

The Paras came along the road
And into view at last.
A young man pushed the plunger
And there was an awful blast. CHORUS

We opened up along the road
With everything we had
Before the ambush ended
We knew we'd hit them bad. CHORUS

Now politicians raise their hands
An act of terror say
But they let us rot for fifty years
It is the only way. CHORUS