Throughout the year, international and domestic actors struggled to end the armed conflict in eastern Ukraine, but the situation has remained unstable. Parts of Donetsk and Luhansk regions remain under de facto control of Russia-backed fighters. All sides in the conflict violated international humanitarian law. Travel restrictions introduced by the government in January 2015 contributed to severe delays in delivery of humanitarian assistance, including medicine, to conflict-affected areas, resulting in a dire humanitarian situation for civilians. As of fall 2015, according to estimates by aid groups, over 5 million people in eastern Ukraine needed humanitarian assistance, with over 3 million most vulnerable.