Very similar what happened to Russia when they believe(d) their own propaganda - getting to Kiev in 3 days and La Manche in a year. Year goes by and they have

Very similar what happened to Russia when they believe(d) their own propaganda - getting to Kiev in 3 days and La Manche in a year. Year goes by and they have troubles to take regional city of 70k people and only reason why China did not take over Eastern Siberia yet is that Russians might have few working nukes. But nobody actually knows if there are any working nukes.