It seems you guys don't know much about prophecies but still like write long compositions about it on a forum that too in a volatile time like this.
Let me give you a short chronological idea of the events :
The Black flags, an Islamic nation rooted in different sentiment than others pop up and challenges regional developments and the super powers of the world are unable to stop it from gaining strength and dictating (according to authentic Hadith). The nation is located around the direction of ancient khurasan. (Wink)
That nation then wages struggle because they were being restricted financially and in other ways by the superpowers. (They will be denied goods belonging to them according to the hadith, which sounds a lot like sanctions in the modern day) This nation is also the one that conquers Jerusalem and sets up the Mahdi's governance.
The mahdi comes after Israel is defeated by the Black Flag nation (the color of Marking sorrow or grief) which is the integral part of shia Islamic creed. Hate it as much as u want to or think whatever u like to. The Black Flag nation fights without the mahdi against Israel and defeats it and then waits for his coming to set up his governance in Jerusalem. That's what happens.
Then the mahdi comes and takes over and is supported by the Black Flag nations as well as all the others, sunni shia alike and is able to achieve extraordinary civil reform in a short amount of time. People believe in god again and wake up in a rejuvenated spirit holding hand in hand with each other.
By then the Muslims form a strong alliance with RUM (Rum in the time of the prophet was used to identify the state of eastern Christian Orthodoxy and it's king (Czar or Tsar), which in other words mean Russia. So Muslims led now by Mahdi and Russia form an alliance and launch a campaign against US-led NATO.
This is the third world world but not Armageddon or Malhama. Then the Muslims and Russians win the war and conquer Europe. America is nowhere mentioned after this event nd is most like to be absolutely destroyed in a pre emptive Russian nuclear strike (which makes sense because Russia has shorter nuclear reaction time and if America tries going preemptive Russia will still strike first). But after this joint victory when Muslim demand their fair share, the Russians and the subjugated Europeans betray them and attempt to drive the Muslims off of Europe and conduct a genocide of civilians likened to the holocaust and go after turkey. At that point the mahdi steps in asks the Russians to stop and say that they will be forced to intervene if Russia moves against any Muslim countries. At that point the two former allies gear up for fight. Both sides mobilise and conduct the most brutal and horrifying war in the history of the mankind with nuclear strikes on each other. But in the last phase of the conflict the Muslim relying on superior manpower manage to mobilise and resupply and crush the enemy. So that's Malhama al Kubra for you or Armageddon. The Dajjal comes after this Victory when the Muslims are about to get into the Christian land to settle and Inherit. Then they forget about all of this and focus solely on the Dajjal.
That's the whole of it.