乌克兰原定在2013年11月维尔纽斯召开的东部伙伴关系首脑会议上订立联合协议，然而就在欧盟和乌克兰解决遗留问题时，形势却突然急转直下。
But, as the EU and Ukraine were addressing remaining issues ahead of the November 2013 Eastern Partnership summit in Vilnius, where Ukraine was to sign its Association Agreement, something suddenly changed.