Culture doesn't really have aims; it's an by-product of human social behaviour, something that people create as they live in groups and satisfy their other needs. It's functions are to "remember" certain behaviours that worked in the past, such as certain ways of preparing food.
Politics, technology, consumerism, religion, & economy are all big parts of modern day culture.
Probably one of the better reasons for them to initiate these wars was that it enabled them to destabilize the region and especially the power of their main rival in Greece in terms of military and economics. At the time this rival was considered to be Athens. The end of the Peloponnessian wars ended with Sparta coming out as the reigning power in those parts of the world and Athens being strongly decimated.
<span>Since velocity describes both speed and direction you can call it a vector. </span>
Benin, Burkina Faso, Cape Verde, Côte D'Ivoire, Gambia, Ghana, Guinea, Guinea-Bissau, Liberia, Mali, Mauritania, Niger, Nigeria, Saint Helena, Senegal, Sierra Leone, Togo .