Ilona Andrews - When you want to take over a city, you have...

When you want to take over a city, you have to destroy the illusion of safety it provides. You have to hit the large well-protected establishments, find the powerful people who run them and are viewed as invincible, and kill them. You want to destroy the morale first. Once the people's resolve is gone and everyone is scared for their own skin, the city is yours.