@Bravehart:
Q 1) Mongolia will NOT be negated because of the USA already in Korea, correct?
Correct. A typical allied strategy is to land usa units in Korea or Manchuria and then have Russian troops move into reinforce them. As long as the Russians themselves aren’t taking territories adjacent to Mongolia, it doesn’t break Mongolia’s neutrality.
Q 2) This attack from Soviets on Korea will Negate Mongolia, even though the USA previously held Korea and Russia put there troops in with USA, correct?
Yes, in that case Mongolia would become permanently neutral.
Q 3) So if it was Germany attacking a Mongolian territory to activate Mongolia, causing the other Strict in the world Pro Allies, that Mongolian territory Germany attacked becomes German owned from then on and the other 5 territories in Mongolia Negated?
If Germany were to attack Mongolia (when Mongolia is neutral), then ALL neutral territories would become pro-allied neutrals waiting to be activated.
- Q 4) If my Question 3 is correct, then the Allies can attack that one Axis territory in Mongolia?
If Axis has attacked Mongolia, then the Mongolian rules are no longer relevant, since all neutrals, including all Mongolian territories, are now pro-allied neutrals.