Well, it is obviously a special military operation to denazify and demilitarise the terrorist militia of other country, because it threatens peace and security. /s
Seriously, isn’t this like called a war declaration or something? If you bomb another country and move in troops and kill civilians?
There wasn’t much declarations of war since ww2. Even the US was only technically at war when Panama declared war on them after the US invaded them. Ukraine isn’t technically at war with Russia, they actually do business together transferring gas to Europe. The world is strange.
The US formally declared war on Iraq and Afghanistan. That’s what an AUMF is.