Muslim Arab rulers took advantage of weak Western powers and Invaded Europe and Persia wherein they ruled Spain for 800 years. The Arab rulers were seeking to spread the influence of Islam initially but the conquest of Spain opened the gateways for  Arab rulers for rest of the world whereas the west Africa became the prominent Muslim colony around the 10th century. Therefore the Spain served as main port for trade which Arab rulers used to acces to Africa, China, south Asia including India and people were getting converted to Islam but, the conversion wasn’t being forced or main motive of Invasion. The continuous spreading of Islamic Empire led towards the appearance of Ottoman Empire in Turkey and some European countries and in Persia, Syria and Saudi Arabia  as a strong and powerful socio economic region. Moreover, along with armies and traders the art was also getting exchange between Arabs and foreigners and Mughals from Turkey introduced Ottoman Empire arts and culture in India. The Mughal dynasty ruled India for 1000 years which influenced the Hindu majority of India to be converted into Islam. The Mughals introduced Turkish architecture where they used colorful paintings on the ceilings of buildings like palaces and castles wherein Taj Mahal is the best example. The Mughals also introduced drama and novels through moderate literature in Indian culture and their art loving nature flourished the theatre and art of paintings. In India the Mughals brought modern technology, scientific researchers from Spian and European warfare which directed India to get connected with Western World through trade. 
The spread of Islam In West Africa during eighth century reasoned many accounts like some historian say it was due to spread the spiritual message in other words preaching of Islam, economic motivations same as in case of India, Influence of Arabic literacy in facilitating state building like they introduced Arabic in India as well and it was matter of prestige as well. Trade between West Africa and the Mediterranean predated Islam, however, North African Muslims intensified the Trans-Saharan trade. North African traders were major actors in introducing Islam into West Africa. Several major trade routes connected Africa below the Sahara with the Mediterranean Middle East, such as Sijilmasa to Awdaghust and Ghadames to Gao. The Sahel, the ecological transition zone between the Sahara desert and forest zone, which spans the African continent, was an intense point of contact between North Africa and communities south of the Sahara. In West Africa, the three great medieval empires of Ghana, Mali, and the Songhay developed in Sahel (source: Stanford study of foreign culture).

Patroclus and Achilles are great warriors of Trojan wars who have a strong bond of friendship besides their warrior skilled companionship. Achilles is delicated towards Patroclus to make sure that he stays safe and out of danger when he encounters Trojans while arrogant to others in his military, sometimes confronting them for example, in instance of Argamemnon. Achilles instructs Patroclus to be cautious and careful when chase Trojans and be aware of being setup by Trojans while they retreat and try to trap you around their main land. Therefore, Patroclus neglects all his advisements and unaware of his fate which brought him in battlefield to get killed by Hector, lately  results Hector death in revenge by Achilles. This specific narrative directs Homer towards perception of fate which is controlling Trojan war and also, assigning different roles to gods.
“Forgetting everything Achilles had said And mindless of the black fates gathering above. Even then you might have escaped them, Patroclus, but Zeus’ mind is stronger than men’s” (Iliad). The Achilles and Patroclus has a special connection between each other which brings Patroclus into the war as an ally even Achilles is worried about him but Homer builds a close connection between their friendship and fate of them and some other great warriors like Hector also. In above quotes from Iliad, the narrator which I believe is god Zeus indicates Patroclus predetermined death which have brought him to Troy to get killed and also to effect some others’ fate. Achilles love for Patroclus is phenomenon which reflects brotherhood, care and strong companionship where he wants Patroclus to avoid from dangerous deadly war zone but to chase only Trojan ships same as in Enkidu and Gilgamesh epic wherein, Enkidu was skeptical about Gilgamesh journey to forest where he was going to encounter ferocious beast Humbaba and wanted to stop him from the possible danger that Enkidu have seen in forest before as Achilles has seen in Trojan war previously. “But the gods did let it happen, and Zeus would now give the helmet to Hector, whose own death is not far away” (Iliad). Therefore, Patroclus gets kill by Hector which takes away his life too by Achilles whose love for Patroclus aggregate anger and revenge.
Achilles suffers with extreme grief and mourns on his best friend death which breaks his dream of conquering Troy with Patroclus but, fate has taken a new turn for him where he can see his possible death. Therefore, Thetis motivates Achilles to go back to battlefield to kill Hector which takes his own life also. It seems like the fate has been set up beyond the control of gods who are also being played as cards and fate seems to be a factor which is inferring during Homer towards end of Trojan war with fabrication of bravery, love, ferociousness, friendship, justice, rules, intervention of gods and humans with a silly start which would have been anything else than woman too but it has to start from somewhere to make it purposeful. It was just their fate that have brought Patroclus and Achilles to Troy in their close bond of friendship and to die in same battle.