Rasulullah SAW said about the WAR

'Battles (Kitab Al-Malahim)' of Sunan Abu-Dawud.
4278	Narrated AbuHurayrah: The Prophet (peace_be_upon_him) said: Allah will raise for this community at the end of every hundred years the one who will renovate its religion for it.
4281	Narrated Mu'adh ibn Jabal: The Prophet (peace_be_upon_him) said: The flourishing state of Jerusalem will be when Yathrib is in ruins, the ruined state of Yathrib will be when the great war comes, the outbreak of the great war will be at the conquest of Constantinople and the conquest of Constantinople when the Dajjal (Antichrist) comes forth. He (the Prophet) struck his thigh or his shoulder with his hand and said: This is as true as you are here or as you are sitting (meaning Mu'adh ibn Jabal).
4282	Narrated Mu'adh ibn Jabal: The Prophet (peace_be_upon_him) said: The greatest war, the conquest of Constantinople and the coming forth of the Dajjal (Antichrist) will take place within a period of seven months.
4283	Narrated Abdullah ibn Busr: The Prophet (peace_be_upon_him) said: The time between the great war and the conquest of the city (Constantinople) will be six years, and the Dajjal (Antichrist) will come forth in the seventh.
4284	Narrated Thawban: The Prophet (peace_be_upon_him) said: The people will soon summon one another to attack you as people when eating invite others to share their dish. Someone asked: Will that be because of our small numbers at that time? He replied: No, you will be numerous at that time: but you will be scum and rubbish like that carried down by a torrent, and Allah will take fear of you from the breasts of your enemy and last enervation into your hearts. Someone asked: What is wahn (enervation). Apostle of Allah (peace_be_upon_him): He replied: Love of the world and dislike of death.
4285	Narrated AbudDarda': The Prophet (peace_be_upon_him) said: The place of assembly of the Muslims at the time of the war will be in al-Ghutah near a city called Damascus, one of the best cities in Syria.
4287	Narrated Awf ibn Malik: The Prophet (peace_be_upon_him) said: Allah will not gather two swords upon this community: Its own sword and the sword of its enemy.
4288	Narrated One of the Companions: The Prophet (peace_be_upon_him) said: Let the Abyssinians alone as long as they let you alone, and let the Turks alone as long as they leave you alone.
4292	Narrated AbuBakrah: The Apostle of Allah (peace_be_upon_him) said: Some of my people will alight on low-lying ground, which they will call al-Basrah, beside a river called Dajjal (the Tigris) over which there is a bridge. Its people will be numerous and it will be one of the capital cities of immigrants (or one of the capital cities of Muslims, according to the version of Ibn Yahya who reported from AbuMa'mar). At the end of time the descendants of Qantura' will come with broad faces and small eyes and alight on the bank of the river. The town's inhabitants will then separate into three sections, one of which will follow cattle and (live in) the desert and perish, another of which will seek security for themselves and perish, but a third will put their children behind their backs and fight the invaders, and they will be the martyrs.
4293	Narrated Anas ibn Malik: The Prophet (peace_be_upon_him) said: The people will establish cities, Anas, and one of them will be called al-Basrah or al-Busayrah. If you should pass by it or enter it, avoid its salt-marshes, its Kall, its market, and the gate of its commanders, and keep to its environs, for the earth will swallow some people up, pelting rain will fall and earthquakes will take place in it, and there will be people who will spend the night in it and become apes and swine in the morning.