The Second Sino-Japanese War, while a disastrous immediate cause for the downfall of Nationalist rule over China, was not the sole cause. The downfall of the Guómín Dǎng (Chinese Nationalist Party) can also be attributed to the the failures of the Nationalist Decade, and not to mention the rise of the Communists as seen in Yán’ān and the development of Máoism made therein; along with the actions of both the Red Army and the Guómín Dǎng.
World War I was indeed the major cause for the downfall of Tsar Nicholas II and his dynasty. However, while World War I was a major immediate cause to the downfall of Tsarism, the part played by individuals of the likes of Tsar Nicholas II and Pytor Stolypin cannot be underestimated. Events such as Bloody Sunday and the tensions that existed in Russia prior to World War I, as well as Tsardom’s inherent system of repression and the socioeconomic discontent as a result of World War I, are also major contributing factors to the downfall of Imperial Russia.
The Cold War was an ideological conflict to a minor, but nonetheless relevant extent. While ideology, be it communism or capitalism & democracy, were exclaimed as the be-all and end-all by both parties throughout the duration of the Cold War, many times were used as convenient justifications of a state’s actions which, behind closed doors, was very much a traditional power-play between the superpowers of the world, and the acquisition of geo-strategic assets for these ‘superstates’. Both parties were more than happy to throw away their ideology in favour of power, in some shape or form – as seen in cases of both US and USSR aggression throughout the late half of the 20th century. However there were times during the Cold War when it was genuinely ideological, be it for better – such as the Space Race, or for worse – such as the Cuban Missile Crisis.