The Russian War in the national Ukraine

In his opinion that the Russian war was invading and ousting a legal national Ukraine when President Putin would like to end this war, Mr. Putin has self-withdrawn his troops to go home or Russian Government has cut and run out of the national Ukraine like the USA cut and run out of the Republic of Vietnam by the Paris Peace Accords without having compensated any pennies of war criminal. Mr. Putin repays the peace without having invaded and ousted the national Ukraine. Why has Russia had one of the five great powerful countries, but Russia violated the United Nations Chapter? Bright Quang