Getting History Straight - First "Official" ET / Gov contact Post WWII

Getting History straight, United States EXO politics post WWII.

1. 1945 - WWII “officially” ends:

2. 1946 - Operation Highjump:
US Intelligence, aware of German escape and infiltration to Antarctica, commits a large military contingent lead by Admiral Byrd to rout out the remaining enemy presence under the guise of a “training” exercise. The Nazis holed up in Antarctica with their advanced weaponry, along with help from their draco/orion allies, decimate the US forces who end up retreating back in a hurry.
3. 1947 – 1952 Roswell +:
Extraterrestrial craft start accidentally getting shot down by the USA from radar beginning with Roswell in 1947. ET craft and bodies start getting recovered by the US Gov. This almost inadvertently starts a war with those ET groups that were shot down (Orions?).
4. 1952 USA Signs an Unconditional Surrender Treaty to the German's in Antarctica:
After a few incidents (demonstrations?) in 1952 where the Nazi's flew their advanced craft in US airspace, the Nazis fly a dozen advanced craft in Luftwaffe formation over the White House in Washington DC to demonstrate military superiority. Some segment of the USA government (some confusion whether President Eisenhower was involved or not) sign an unconditional surrender treaty to the Germans stationed in Antarctica as a result since they know they are totally militarily outmatched.
5. 1954 First Contact and the Greada treaty:

6. 1954 Bikini Atoll ET Base Nuke Attack:
The United States conducted a nuclear bombardment against an ET group (Can EA comment on which group was attacked and why) which had an extensive underwater base in the Bikini Atoll Island area. The attack was whitewashed as a “test” and a number of humans living in the area were physically force relocated. The attack was successful and totally destroyed the alien base and presence in Bikini (I suppose thusly proving the importance of keeping the nukes if they were able to eliminate an alien threat so easily with them).

7. 1954 – 1960ish The ET's Don't Keep their word:

I have some questions in regards to the above outlined period of events:

In regards to #3 in the list of events, what was the threat that the Nazis issued to the US gov officials that caused them to sign a unconditional surrender? That they would invade or destroy the USA? Did Eisenhower agree to this surrender, or was it done by secret group / cabal of the US Government without his knowing or consent? Did the US not think they could fight back even if using the nukes and radar at their disposal that had successfully shot down craft before? What were the terms of the surrender? Did the Nazis give any similar threats to the USSR or make them sign any treaties considering how brutal Russia was to Germany during the end of WWII?

It's very interesting how the Antarctic Nazi threat and the ET threat coincided around the same time. How did the Antarctic Nazi group tie in with the Greada treaty? Did the US mention the Nazis as a concern during their ET negotiations? What was the response from the ETs to the US concerns about the Nazis? What would have happened if the US didn't surrender to the Nazis in 1952? How would it have changed the type of treaty signed with ETs 2 years later?  Would the Nazis really have attacked the US and if so, what would have happened then?

In regards to #5 in the list of events, what happened in alternate timelines / histories where the USA came to an agreement with the Nordic ETs? What were the most common results that unfolded in those realities from shortly after the agreements was made, to say around where we are in history now (2023)? Did humans adapt well to the arrival of positive extraterrestrials and actually spiritually grow? Did it result in a golden age for humanity / earth? Or did it kick off a war with the Orion group instead? Did the nuclear disarmament put humanity at a disadvantage if it triggered aggressive action from the hostile aliens? What typically ended up happening in those timelines with USA / Nordic agreements?

Were there alternate timelines where the humans ended up going to war with the Orions instead of signing treaties with them? What happened in those timelines? Did Humanity unite as a single world to fight against the ET threat? Did humans have any success using nukes and radar to shoot down the crafts / bases of the Orion ETs? Did other positive ETs species join in to help the humans fight off the Orions? Give us some examples of what happened in those timelines where outright war broke out in the 50s with the Orions.

Does EA have anything else to add, or comment?  Thanks!