Lincoln did NOT want another nation formed. He wanted the US to remain intact. Which is why he did NOT declare war on the Confederacy...they would have won the war with "that one stroke of the pen!" Another words, the South (Confederacy) would have been recognized as another nation, if Lincoln declared war them. As it was, the war was illegal, a war of rebellion (it's official title).
Yes. The Head of State Doctrine outlines this provision.
England
To establish a sovereign nation, it is necessary to declare independence from the ruling authority or government of another country. This typically involves breaking political, legal, and economic ties with the existing governing power and asserting self-governance and autonomy.
A Republic Nation.
bhutan
It's illegal to spank children in Sweden. And the only nation in the country Sweden is the nation with the same name.
1949
England
A country can formally declare independence from another nation by issuing a declaration of independence, which clearly states their intention to be recognized as a sovereign and independent state. This declaration is typically followed by diplomatic efforts to gain recognition from other countries and international organizations. Additionally, the newly independent country may need to negotiate with the former ruling nation to establish new agreements on issues such as borders, trade, and security.
1827
On Japan.