"No mention of any invasion threat."
You've been given this information before - Lloyd George's threat was as unequivocal as was your statement about Irish people being given the opportunity to choose where to live (only, more grounded in fact.)
If you think I'm going to enter into another farce with you presenting historians you have scooped up off the net and don't have the interest to have read, you really are out of your mind.
Below is the actual quote from Lloyd George making that threat.
That he was capable of carrying it out was obvious by his readiness to send in armed thugs prior to the treaty negotiations.
"Start another thread maybe to talk about Partition."
I have no intention of doing so, nor do I have any intention of cluttering up this discussion to be part of allowing Keith to embark on yet another flight of fantasy - I'm done - my apologies Mac
Jim Carroll
   

"We have gone through this document and met you fairly. ' said Lloyd George when he returned. "Are you now prepared to stand by this Agreement whichever choice Ulster makes? " Griffith agreed. But his was a lone voice.
Lloyd George exerted pressure: "Is it a bargain between Sinn Fein and the British Government? I have to communicate with Sir James Craig tonight. Here are the alternative letters which I have prepared, one enclosing the Articles of Agreement reached by His Majesty's Government and yourselves, the other telling Sir James Craig that the Sinn Fein representatives refuse allegiance and refuse to come within the Empire, and that I have therefore no proposals to make to him. If I send this letter it is war—and war within three days. Which of the two letters am I to send? That is the question you have to decide. "