Russia-Ukraine: Security Dilemma
Solving problems through war cannot be justified for whatever reason. This is a lesson for potential aggression in other areas, such as Taiwan and the South China Sea.
Why has the Russian-Ukrainian War occurred? The answers are varied and many are contradictory. However, Russia's military offensive on such as scale was a way of resolving disputes between countries in the 20th century.
The wars of the 20th century were marked by two World Wars, as well as several major wars such as the Korean War and the Vietnam War and various conflicts in the Middle East and other regions, such as Afghanistan on a smaller scale, but with a large impact. It was always marked by a military offensive of one country against another or an alliance of supporting countries.