Here is today's map of the security situation in eastern Ukraine, according to the National Security and Defense Council:
EU Leaders To Discuss Ukraine, Syria, Brexit At Summit
EU heads of state and government are meeting in Brussels on December 15 for a one-day summit to discuss some of the crises faced by the European Union this year.
The EU leaders are expected to roll over sanctions against Moscow over the conflict in Ukraine for another six months.
They will also hold talks about an agreement for political and commercial ties between the bloc and Ukraine that the Netherlands has threatened to torpedo.
The Netherlands, the only EU member state that has not yet ratified the deal, wants to clarify that the pact does not put Ukraine on the path to EU membership.
On Syria, EU leaders are expected to strongly condemn the assault on eastern Aleppo by the Damascus regime and its allies.
The EU leaders will hold an informal working dinner, without British Prime Minister Theresa May, to discuss how to handle Britain's departure from the bloc.