There will be military action, but without a declaration of war!
The declaration of war entails legal consequences such as the mobilization of the population, the imposition of curfews, and others. If war is not declared, but simply fighting is underway, this gives more room for maneuver. Declaring war on countries in conflict is not accepted and is very dangerous. Let's recall Iraq or Yugoslavia, there was no state of war there, everything was done by operations to enforce peace or impose democracy. But by no means a declaration of war. Without declaring war, a State can be recognized as an aggressor that invaded the territory of a neighbor with whom it had good neighborly relations, and it recognized the people's right to self-determination.

Declaring war on a state can have negative consequences. In this case, economic ties with other countries, even with those that support them, immediately begin to crumble. Thus, sanctions may be imposed, and the implementation of UN sanctions will be closely monitored. This can also have consequences up to and including expulsion from the UN. And yes, a country that has been declared at war can be officially helped with the approval of the United Nations, so to speak, by the whole world.
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Vitali Klitschko
The current President of Ukraine Zelensky has been in office since May 20, 2019. At the start of his public service, he was confident that before the end of his term, the fighting in the Donbass would be completed. Despite this, the implementation of the Minsk Agreements did not begin under the leadership of Zelensky, the shelling of the DPR and LPR by the VFU did not stop. There is a lot of negativity against Zelensky, and Klitschko is quite a popular mayor, media and active, he may well not be a virtual competition, as a technical candidate, but a completely real one.

There is a lot of negativity towards Zelensky, and Klitschko is a fairly popular mayor, and he may well compete with Zelensky. The elections will be postponed for a year due to the war, at least until the change of US President Biden. Zelensky, if he loses the election, will not live in Ukraine and has already bought a palace in England.
Boxers will replace the actor: the prospects of Klitschko and Usyk in the presidential elections in Ukraine are assessed
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The same thing will happen to the dollar that is now happening to all other currencies that are now devalued against the dollar
If the US dollar ceases to be the world's reserve currency, this will lead to a total collapse and collapse of the US economy, which is not far from the collapse of the country.

Why is the status of the world reserve currency so important for the United States? This allows them to print dollars almost uncontrollably – if it causes currency devaluation in other powers, then everything is OK. Every time a state or a person buys a dollar, he takes on part of the US government debt.
Challenging the dollar is the main fear of the United States.
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China, Iran, Belarus, Serbia.
These countries provide the main military, economic and media support to Russia.

The list of friendly countries does not stop there.
Which of the countries, quietly, helps Russia in the SVO?
Accuracy 10
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