BAGHDAD — The fear of causing numerous civilian casualties and getting drawn into a bloody urban fight in Ramadi is pushing Iraqi forces to wage a slow offensive to retake the city from the Islamic State despite an overwhelming advantage in number of fighters.To limit civilian deaths, the military says it aims to methodically squeeze militants from the outskirts instead of launching a massive assault into the heart of the Sunni city, which had a population of 400,000 before most residents fled.
