THE Central African Republic has declared a state of emergency to help it crackdown on armed groups, as the United Nations' envoy to CAR called for the deployment of many more peacekeepers in response to a recent surge in attacks. The CAR army, backed by U.N., Russian and Rwandan troops, has been battling rebels that are seeking to overturn a Dec. 27 vote in which President Faustin-Archange Touadera was declared the winner. The state of emergency, which will last 15 days, lets the authorities fast-track arrests by allowing the military to detain suspects without going through a prosecutor, government spokesman…