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Actually, if you look at this situation from Kittypink's perspective, I see something like this, although I may be wrong:
1) There is a direct ideological and other opponent, Rex Ventorum with its allies. Isn't that right?
2) There is the country of Champignon, on whose territory there are not only uranium mines and factories, which in the event of an alliance will almost immediately (and in fact) come under the control of Kittypink, but also territory bordering several countries of the alliance, from where it will be quite convenient and effective to conduct hostilities and deploy anti-missile defense systems. The government of this country is ready to become a "slave" of the Dominion.
3) There is a direct threat of mutual massive destruction or numerous casualties in the event of a full-scale conflict with the use of nuclear weapons. In this case, it is obvious that the giant countries will not directly attack each other at the moment, but will try to force the opponent to start aggression first through various provocations.
In essence, there is no direct threat to Kittypink in the event of a change of power in Champignon, however, there are a number of factors for which such a state may feel offended and react accordingly. These include:
a) Loss of control over the market, industry, and disruption of trade agreements. A huge outflow of funds to Ventorum if the new leadership of Champignon becomes actually subordinate to the Federated Republic. This factor is already quite worrying.
b) Loss of uranium deposits, factories, strategically convenient positions, and, most importantly, anti-missile defense systems, if, again, there is a change of power. Here, Kittypink may well decide that the miserable capitalists have encroached not only on its sovereignty but also on the security of the state, which could lead to a conflict.
Here are the solutions I see to this problem:
I) A change of power in Champignon with the consent and direct participation of Kittypink and without unnecessary bloodshed.
II) Maintaining all current agreements with Kittypink after the re-election of the government, joining the Security Council of Actea.
III) Developing diplomatic relations with Rex Ventorum and the other countries of Actea. Normal relations.
In this way, it is possible to avoid unnecessary casualties, and most importantly, all parties will be satisfied in the end. Except for the barbarians.