Careful study and comparison between the story of Mahabharata and Trojan war (Iliad) will reveal that Mahabharata story is modified form of Trojan war. This adaptation of this story might have occurred after the "Invasion of India" by Alexander. Further there is a chance that the the Greek ideas might have entered India after the rule of Indo -Greek rulers (see the link) , who had entered India from Central Asia after invasion of their Bactrian kingdoms by Scythians. The invasion of India by Greeks is totally forgotten by Indians, but the influence of Greeks lingers on. Only problem is that Indians don't recognize it.
Note the similarities--
Pandavas were sent to forest for 14 years, similarly the Greek-Trojan conflict went on for nearly 14 years. The actual conflict described by Homer in Iliad is only 14 days. Same is the case with Mahabharata war, the war at Kurukshetra went on only for 14 days. The Trojan war scene of Iliad starts with reluctance of Achilles to fight the war. Arjuna does the same in the beginning of Mahabharata war in the beginning of the war. Arjuna asks Krishna to take him to the centre of war field, and after seeing both armies formations , he refuses to fight and drops down his bow and arrows. Later, the lamentations of Achilles over the dead body of Patroclus is similar to lamentations of Arjuna over the dead body of of his son Abhimanyu.
During the Mahabharata war, the war was stopped in the evenings and was resumed in the next day. Is it really possible to conduct a war in this method? Only fools alone can do such a blunder. Our honorable Indians will give an explanation that Indians followed so much Dharma, they could have followed such a righteous rules of war.It is less likely that the wars were conducted in such a fashion in ancient India, it was always finish to death "in a single day". (The wars were like one day matches of modern Day Cricket).
Then, why such a story had been written?The answer lies again in the story of Ulysses and Trojan war. Note the location of battle field in the Trojan war. The Trojan war was fought on a beach head in front of a fort. Trojans were inside a fortified city, they could afford the luxury of such a controlled warfare and in fact they followed such a controlled warfare, in which they retreated into the fortified city in the evenings. The likely scenario was that the Greeks were always accompanied by great bards and drama troops, these bards were retainers and propagators of Greek cultural ideas and ethos. Greek dramas were main source of their cultural stability. It is likely that the great stories of Greece could have been introduced into India after Alexander's invasion. In addition to that there is a possibility that these Greek stories could have been introduced by the Indo Greek rulers of central Asia and India. The same Greek stories had got transformed and so much localized to Indian condition that the original has become totally untraceable and could not be seen. It is high time that some comparative studies are taken out to ascertain the influence of Greek stories on Indian epics and mythological stories.
Note another character in the war scene, Sanjayan describes the war, scene by scene to the blind king Dhridarashra, using his extraordinary vision. Power of Doordarshan given by Vyasa Rishi. Will it be possible? But, it really happened in the Trojan war, the Trojan king was watching all the events sitting in the fort wall, his minister was narrating to the king various events of war. The Trojan king was very old person, he could not stand by the fort wall the whole day. Even though the king was sitting on the fort wall, somebody had to watch closely standing by the wall and to narrate the king the events of the battle field (like a cricket running commentary) . This commentary work was assigned to one of his ministers, and that character has been transformed into "Sanjayan" in India. It was quite possible to accurately see all the happening in the war, which was going on in the ground level.
Bhishma had taken the role of Hector, the righteous son of Priam, Duryodhana has taken the role of Paris. King Priam had nearly 100 sons (son in laws + grandsons put together) all of them lived in the same fort. In the end of war the troy was burnt, while the Trojans slept. But in the Indian story this scene got changed drastically and camp of Pandavas got burnt. One notable feature is that the story of wooden horse "Trojan Horse" is missing in Indian version of the story. That shows that Trojan horse story was later day interpolation. In fact, in Iliad story there is no mention about "Trojan horse", it appears later only in Ulysses story, at the time of return journey of Ulysses.