In 2010 i have found an internet forum (dead now) where one guy was interpreting nostradamus' prophecies - the thread's name was "When will the WW3 start?" (Kiedy wybuchnie 3 wojna światowa). He was writing about islamic terrorist state which will arise in the middle east, about war in ukraine and many other things that will happen before WW3. So the last event which will happen right before the WW3 is "world peace" signed in Jerusalem between arabs and jews. So i think we are getting there soon. I actually have a pdf with some of those posts (posted 2008-2009)
Before the "peace" there will be a "dirty bomb" detonation in the middle east.