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The first Call of Duty 4: Modern Warfare trailer featuring game footage was released on April 28, 2007. In the background a speech is heard in Russian: Сегодня, одной нацией мы воспрянем перед лицом предательства и оккупации, which translates as "Today, as one nation, we shall rise in face of treachery and occupation." One hears the statements "Enemy Forces Sighted" and "American Forces Nearby", spoken in Arabic. A final voice at the end speaks the Russian translation of a quote by Sun Tzu, author of The Art of War: "Всякая война враньё" (Every war is a lie).
During E3 a trailer featuring actual gameplay footage was released. Starting in Prypiat, Chernobyl's Zone of Alienation, the voice of an SAS operative (MacMillan) is heard saying: "50,000 people used to live here, now it's a ghost town…" The voice then changes to Zakhaev's monologue in which he states: "Our so called leaders prostituted us to the West, destroyed our culture, our economies, our honor…" It then changes to Middle East, depicting a combat sequence. In the background, a woman's voice reading the news is heard saying: "…US Marines, stationed on high alert, were given the order to invade the small…" (apparently the country in which Al-Asad has organized the coup). It shows an execution of several civilians from the perspective of a driving car. It then cuts back to Zakhaev's monologue: "just as they lay waste to our country, we shall lay waste to theirs.", and shows buildings being destroyed as a result of a nuclear detonation. Then it cuts to an unknown person saying "You think this will stop the bloodshed?" and then an ICBM launch is shown, and a voice in Russian finishes, "Вы все всё равно скоро сдохнете", which translates as "You will all soon die anyway." -wikipedia
E3 trailer is the intro movie at the start of CoD 4.