Our Prophet (saas) announced that the dajjal (antichrist) will be the biggest instigation of the history of man:

There have been no great strife than that of the antichrist, since the day of the creation of the Prophet Adam (as) to the Last Hour. (Al Barzanji, Al-Isha'ah li-ashrat al-sa'ah, p. 225)

All of the incidents that our Prophet (saas) announced as the portents of the coming of the antichrist have been realized successively one by one.  Our Prophet (saas) said that the system of the antichrist will make people irreligious. Today 99% of people are under the influence of scourges like wars, conflicts, terror brought by irreligiousness, slaughter of innocents, murders and increase in the number of suicides which show that the antichrist is on action. In other hadiths our Prophet explains the environment that the antichrist will cause : 
 

... (At that time) MISCHIEF, DISORDER, COUPS OCCUR A LOT AND PEOPLE KILL EACHOTHER. People will commit suicide and scourges will pervade the earth. And in such a troubled time… CURSED ANTICHRIST.. will come (Ash-Sharani, Mukhtasar Tazkirah al-Qurtubi, p.482)

 

"Time (the Day of Judgment) approaches, the deeds will decrease, excessive meanness and ambitions will take seed in humans and there will be a lot of tumult," commanded our Prophet (saas) The companions asked; What is tumult? Messenger of Allah commanded : "IT IS MURDER!, MURDER!" (Bukhari, Volume 13 page.6023)

20th century had been a century in which unprecedented big wars took place. With the influence of Darwinist, materialist, communist and fascist ideologies, the system of the antichrist caused the destruction of thousands of town, villages and cities, the death of more than 1 billion people due to famine, neglect, diseases, poverty, suicides and massacres and about that much people to be injured and become permanently disabled in the First and the Second World Wars.

In the First World War big masses have been murdered with aerial bombardment which had been used for t-he first time and the cities have thus been destroyed.   The fact that the antichrist will use airplane technology has been stated in the hadiths with an allegorical narration.

Under the feet of the Dajjal the earth will be rolled up as the skin of the ram is rolled up from wool. (Dajjal will act that fast ) (Hakim al-Nishaburi, Al-Mustadrak alaa al-Sahihain, 4; 529-530).

 

Dajjal goes as fast as the wind sweeping clouds before it. (Muslim, Kitab al-Fitan: 110)