Explain the significance of crimea both historically and presently.

Http://m.historyextra.com/feature/complex-crimea-history-relationship-Russia-Ukraine-Crimea

An informal structure in a bureaucracy would be something like so-called "office politics". where there's a formal structure set up for the organization, but then an informal subculture as well that has a way of organizing the bureaucracy further. this can be positive because it sets up an added degree of organization, albeit informal, within the bureaucracy.