World War 3 or the “Next Big War” are extremely popular in all sorts of fiction for obvious reasons. Most of the time the origins of the war are unexplained or are somewhat realistic (border skirmish turns hot, proxy war spiraling into a global war etc.) but sometimes the writers either don’t know politics/geography or just don’t care despite the fact the setting itself is somewhat grounded or actually calls itself realistic.
This is for anything that tries to take itself seriously (as in no dragons or robots or magic or aliens or superpowers) but the cause of the war is much too improbable or even completely asinine, so much so it takes you out of the work.
Twilight 2013 is an update of the 80’s table-top RPG Twilight 2000 which itself was lauded for its realistic story, set in the aftermath of a Cold War Gone Hot in the mid 90’s over East Germany which lasts until 1997 where it ends in a limited nuclear exchange between NATO and the Soviet Union. Since the idea of a NATO/Warsaw Block Nuclear War was seen as too dated it was decided to update the setting in 2008 to envision a new probable nuclear war in 5 years time. The results were very confusing.
Starting in 2008 the background to the eventual war has a lot of things now common to the genre, the US/EU getting boggled down in various wars in Africa and the Middle East, Climate Change causing widespread crop failures, a US/European trade-war with China, collapse of Pakistan’s government which causes nuclear material to be smuggled out of the country, a regional war in the Middle East between Iran and Saudi Arabia, among other things.
Things start getting confusing fast though, after an incident where 50 Mexican civilians are killed after a shoot-out between the DEA and Drug Smugglers at a border crossing causes Mexico to completely close its borders to the United States. South Korea invades North Korea which immediately collapses and Korea is unified by the South rather bloodlessly. The United States and Europe agree to completely cut-off trade with China over them overstepping their bounds militarily in SouthEast Asia which cripples its economy while somehow not doing the same to the West.
Then things get completely stupid. Terrorists detonate a nuclear device in France in 2010 which kills 10,000 people. Europe as a whole responds by cracking down on immigration and re-militarizing. Eventually it’s discovered the terrorists were trained and had covert support by the Belarus government for some reason. France immediately responds by hitting the Belarus terrorist training camps with six separate nuclear strikes. The Belarusian government promptly collapses and Russia quickly moves in to restore order (and grab some new territory for itself in the process). Then for whatever reason Russia decides that since they now own Belarus, the nuclear attack was an attack on Russia itself retroactively and decides to nuke France in return. The European Union declares war on Russia and start launching nukes back but the United States declares itself neutral in the conflict (mainly due to the fact it’s now embroiled in the Iran/Saudi War on Saudi Arabia’s side) which Russia accepts simply because American anti-ICBM defenses are considered too strong.
With the United States seemingly unharmed for the first time ever in a Russia/NATO nuclear war they simply hang-back in the clear until 2013 where China rears it’s ugly head again and decides they want in on this nuclear war business too. Dozens of Chinese nuclear subs surface off the American West Coast and start launching nukes all over in revenge for the trade war. In addition tens of thousands of Chinese special forces soldiers are deployed all over the United States to fight a long guerilla war by destroying power plants, communications facilities and seats of government. Seeing this chaos Mexico and for whatever reason Canada decide to invade the United States and take pieces for themselves.
When the game itself begins in late 2013 the world is a total wreck. Europe is utterly devastated and England collapses back into a feudal monarchy lead by the surviving Royal Family. Russia despite nuclear devastation has its still relatively operational army slowly marching further into Europe. China is invading Japan, Korea, Taiwan, the Phillipines and Southeast Asia with a free hand due to no American interference. Israel is retreated into Egypt to escape the now massive Sunni-Shiite War that sprung from the Saudi-Iran War. The United States struggles to maintain order as a small civil war between the military and civilian government erupts. Canada immediately lost their war against the United States (for obvious reasons) and Canadians are being smuggled into friendly Mexico by a new underground railroad to escape harsh treatment by Americans. The military wins the Second American Civil War and the US President makes a last speech about how every single city and state is now on its own. The only place left untouched by the global war is now South America (I’m assuming China’s in the process of invading Australia at some point).
So yeah, trying to find examples of WW3 that are as equally batshit insane as that.