I also haven't been able to find any information online that substantiates your claim about British military involvement in the US war with Vietnam, Ireland. I'm a pretty fair online researcher, and I can find nothing about the British army in Vietnam at that time.

If it is understanding you are seeking, IMO, you should be willing to meet people half way. So I ask again please, put aside your anger, and share with us what you know, that we do not. That would truly further understanding Ireland.