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Instead choosing to cooperate closer with Russia. Small protests start.
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Some 100,000 people attend a demonstration in Kiev.
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Protesters occupy Kiev city hall and Independence Square, some 800,000 people rally in Kiev.
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Putin agrees to buy $15bn of Ukraine's debt and reduces the price of Russian gas by a third
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Protest clashes with the military and police begin to turn deadly and protesters begin storming regional government offices in Western Ukraine.
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Ukrainian Prime Minister resigns and annuls the anti-protest law. Amnesty bill is passes but rejected by the opposition.
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All 234 protesters arrested since December are released. Kiev city hall, occupied since 1 December, is abandoned by demonstrators, along with other public buildings in regions.
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Reasons unclear, 18 are killed
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Kiev sees its worst day of violence for almost 70 years. At least 88 people are killed in 48 hours. Video shows uniformed snipers firing at protesters holding makeshift shields.
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President Yanukovych disappears. Protesters take control of presidential administration buildings. Parliament votes to remove president from power with elections set for 25 May
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Parliament votes to ban Russian as the second official language, causing a wave of anger in Russian-speaking regions; the vote is later overturned. Parliament names speaker Olexander Turchynov as interim president. Arseniy Yatsenyuk is nominated prime minister
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Pro-Russian gunmen seize key buildings in the Crimean capital, Simferopol. Unidentified gunmen in combat uniforms appear outside Crimea's main airports.
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Russian parliament approves President Vladimir Putin's request to use force in Ukraine to protect Russian interests.
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Crimea's secession referendum on joining Russia is backed by 97% of voters, organisers say, but vote condemned by West as a sham.
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The EU and US impose travel bans and asset freezes on several officials from Russia and Ukraine over the Crimea referendum.
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Protesters occupy government buildings in the east Ukrainian cities of Donetsk, Luhansk and Kharkiv, calling for a referendum on independence. Ukrainian authorities regain control of Kharkiv government buildings the next day.
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Russia, Ukraine, the US and the EU say they have agreed at talks in Geneva on steps to "de-escalate" the crisis in eastern Ukraine. Three people are killed when Ukrainian security forces fend off a raid on a base in Mariupol - the first violent deaths in the east.
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Ukraine's acting president orders the relaunch of military operations against pro-Russian militants in the east.
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Pro-Russian separatists in Donetsk and Luhansk declare independence after unrecognised referendums.
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Ukraine elects Petro Poroshenko as president in an election not held in much of the east.
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Malaysia Airlines flight MH17 from Amsterdam is shot down near the village of Grabove in rebel-held territory, with the loss of 298 lives.
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The EU and US announce new sanctions against Russia.
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A huge Russian convoy delivers humanitarian aid to the government-besieged city of Luhansk without Ukrainian permission.
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NATO reports a "significant" withdrawal of Russian troops from eastern Ukraine.
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Human Rights Watch says it has strong evidence Ukraine attacked populated areas of Donetsk with cluster bombs, banned by many other states.
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Russia agrees to resume gas supplies to Ukraine over the winter in a deal brokered by the EU.
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NATO commander Gen Philip Breedlove says Russian military equipment and Russian combat troops have been seen entering Ukraine in columns over several days.
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By January, the Minsk Protocol ceasefire has completely collapsed after a wave of heavy fighting breaks, notably at the Donetsk airport, a symbolic battlefield where Ukrainian forces sustain many casualties.
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Russia implored to halt actions in Eastern Ukraine by Barack Obama. Preliminary ceasefire and scheme to remove heavy weapons agreed.
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Agreement lays out a plan for a complete ceasefire and further, broader political concerns in the coming years. Potentially ending conflict in Ukraine.
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Fighting in Ukraine begins to spread as the Ukrainian army retreats. Poroshenko calls for UN peacekeeping forces to monitor the Ceasefire.
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In compliance with the Minsk II agreement, all weapons with a caliber over 100mm begin to be withdrawn from the border region.
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Contrary to past claims, Putin admits that his government had plans to annex Crimea prior to the sighting of rebel forces in March of 2014
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Poroshenko says: "This brings Ukrainian and US military cooperation into a fundamentally new dimension.
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Following the news of the new Minsk talks, rebel activity saw a significant rise over a period of 24 hours.
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Five military agreements between Ukraine and Russia annulled following extensive Russian support for rebellion on Eastern Ukraine.
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Military personnel bearing no identifying marks or insignia mass on the border between Russia and Ukraine. Similar in nature to the unidentified soldiers that undertook invasion and annexation of Crimea in March of 2014.
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EU agrees upon a six-month extension of sanctions on Russia, running until the end of January 2016.
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Ukraine dismisses Russian suggestions of a short term deal. EU and the Ukraine seek a longer term deal but this does not appeal to Russia.
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By the end of 2015, the Pentagon plans to assist in the training of all military troops whereas before it was limited to interior ministry troops.
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Angela Merkel and Francois Hollande plan to speak with Putin about resolving the conflict in Ukraine.
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The September 2015 ceasefire has more of an impact than those of the past.
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EU agrees to extend sanctions for an additional 6 months through until march 2016.
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A number of agreements between the two parties have been agreed upon, with a major focus on counter-Russian propaganda and the development of the Ukrainian military.
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Agreement reached for the two warring factions to withdraw mortar shells and rockets with a caliber of less than 100mm.
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Following the withdrawal from the line of contact, accusations have been thrown about of violations to the ceasefire agreement. Ukraine warn that they may be forced to return to the line of contact in order to protect their interests.
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Russia announces that they will be suspending the free trade zone with the Ukraine at the beginning of 2016, due to the decision for Ukraine to join a free trade zone with the EU.
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Russians attack Ukrainian positions a reported 84 times in the space of 24 hours.
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The leaders of Russia, Ukraine, Germany, and France announc a ceasefire beginning on February 15th. This agreement was reached after more than 16 hours of marathon discussions in Minsk. It calls for a ceasefire between Ukrainian forces and Russian-backed separatists, the withdrawal of heavy weapons from the front line, and constitutional reform to give eastern Ukraine more autonomy.
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EU agree to extend sanctions for a further 6 months, until January 2017.
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A serious battle occurred on June 29th near the town of Debaltseve. Ukraine placed blame on the separatist forces.