On twentieth anniversary of the 9/11 attacks it is important to remember this. This is always important to consider the cause and reasons for war the search for weapons of mass destruction for instance. Aristotle who was a great philosopher traveled with Alexander the great when he conquered the eastern empire. Their strategy was to bring I soldiers and their families and settle the region once they had taken it. So that the empire spread with cultural stability. The soldiers march into the country sack the capital and stay there taking up their lives as before at home now in a new land. The next army marches in and through into the next battle. The bring their family and women and children as well as language and culture and that is why the Roman empire was so vast and monolithic. Update 08/29/2021: It is well known Osama bin laden was captured and brought to justice c. 2012