The following is a timeline of the Syrian civil war from January to April 2012, during which time the spate of protests that began in January 2011 lasted into another calendar year. An Arab League monitoring mission ended in failure as Syrian troops and anti-government militants continued to do battle across the country and the Syrian government prevented foreign observers from touring active battlefields, including besieged opposition strongholds. A United Nations-backed ceasefire brokered by special envoy Kofi Annan met a similar fate, with unarmed UN peacekeepers' movements tightly controlled by the government and fighting, as well as acts of violence described as "terrorism" by the Syrian government, continuing despite both parties' nominal agreement to end the violence.