Well, I'm a Vietnam War Veteran and I've kept this to myself for some time.
Back in the Nam I was part of a LRRP unit.
LRRP stands for Long Range Reconnaissance Patrol, and it consisted of a team of 6 men, a Team Leader, Assistant Team Leader, Medic, Engineer, Weapons Specialist, and Radioman.
I was out with my team in IV Corps in the Vietnam jungles.
We had humped through the boonies all day and we set up an NDP, Night Defensive Perimeter.
We took turns sleeping and keeping watch.
At about 1:45 a.m. I heard movement ahead.
My bro Levin, heard it too.
We woke up the other 4 men and we all readied ourselves for the upcoming contact.
It was then that we saw it, an alien, in real life.
My stomach sank as I saw the creature.
It looks like the modern alien, a grey human with a long face and large black eyes.
It gave off an eerie glow.
Anyway, my friend Boltach raised his weapon and fired.
He hit the being in the head with a short controlled burst.
A brilliant blue syrupy fluid splattered the trees behind the alien.
Just then we saw a dull light in the sky.
Back then, we had a device called a Starlight scope.
Only special operations had them, it's a lot like night vision.
I focused in on the light in the sky and at that moment 2 more lights appeared.
They formed the shape of a perfect triangle.
The light at the top circled the 2 below in a figure 8 and zipped off.
The remaining 2 seemed to collide and both zip off in the same direction as the first light.
That night 2 other LRRP teams in our AO, area of operations,reported in the same activities.
We called into HQ and they said they were having radio problems and would be off-line for the rest of the night.
We linked up with the other 2 teams for security reasons and shared our encounter with them.
4 of the other men with me on my team that night were later killed in various engagements in the war, and I haven't been able to get in contact with anyone from the other teams.
Only me & Levin are still around.
I hope you can come up with other stories and vets who have reporting UFOUFOs in the Nam.