Ukraine paid the highest possible price to realise its "European dreams", the country's president has said, as he signed an agreement with the EU.
Former president Viktor Yanukovich's decision to turn down an EU agreement last November in favour of closer ties with Russia sparked widespread protests and eventually led to his overthrow.
Russia subsequently annexed Ukraine's Crimea region, and pro-Russian separatists declared independence in eastern Ukraine.
"Over the last months, Ukraine paid the highest possible price to make her European dreams come true," Petro Poroshenko told EU leaders at a signing ceremony in Brussels.
More top news
Councils call for urgent changes to law that allow minibus drivers to operate without criminal record checks.
The maintenance worker spent 10 days in hospital after plunging 9.5 metres from a scaffold tower at a disused station.
Workers and managers are to stage another strike on Saturday amid a long-running dispute over jobs, pensions and closures.