Nov. 21, 2013 — President Viktor Yanukovych’s government announces it is abandoning an agreement to strengthen ties with the European Union and is instead seeking closer cooperation with Moscow. Protesters take to the streets.

Nov. 30 — Images of protesters bloodied by police truncheons spread quickly and galvanise public support for the demonstrations.

Dec. 1 — A protest attracts around 300,000 people on Kiev’s Independence Square, known as the Maidan, the largest since the 2004 Orange Revolution. Activists seize Kiev City Hall.

Dec. 17 — Russian President Vladimir Putin announces Moscow will buy $15 billion worth of Ukrainian government bonds and cut the price Ukrainians pay for Russian natural gas.

Jan. 22, 2014 — Two protesters die during a confrontation between police and demonstrators manning barricades.

Jan. 28 — In concessions to the opposition, the Prime Minister resigns and parliament repeals harsh anti- protest laws that set off the violence.

Feb. 16 — Opposition activists end their occupation of Kiev City Hall in exchange for the release of all 234 jailed protesters.

Feb. 18 — Protesters attack police lines and set fires outside parliament after it stalls on a constitutional reform to limit presidential powers. Riot police respond to the violence by trying to push protesters off Independence Square. Eight die and hundreds are injured.

Feb. 20 — Hours after a truce is announced, violence resumes, with government snipers shooting protesters from the roofs. 64 deaths occur on this day.

Feb. 21 — Under a European-mediated plan, protest leaders and Mr. Yanukovych agree to form a new government and hold an early election. Parliament slashes his powers and votes to free his rival, Yulia Tymoshenko, from prison. Mr. Yanukovych flees Kiev after protesters take control.

Feb. 22 — Parliament votes to remove Mr. Yanukovych and hold new elections. Ms. Tymoshenko is freed and addresses tens of thousands on the Maidan.

Feb. 23 — Ukraine’s parliament assigns presidential powers to its new speaker, Oleksandr Turchinov, an ally of Ms. Tymoshenko. The new authorities ask the West for loans to avoid an imminent default. Pro-Russia protesters start rallying against the new authorities in Crimea, where Russia has a major naval base.

Feb. 24 — Ukraine’s interim government draws up a warrant for Mr. Yanukovych’s arrest. Russian Prime Minister Dmitry Medvedev derides the new leaders in Kiev as “Kalashnikov-toting people in black masks.”

Feb. 26 — Leaders of Ukraine’s protest movement propose legislator Arseniy Yatsenyuk as prime minister. In Moscow, Mr. Putin orders major military exercises just across the border.

Feb. 27 — Masked gunmen seize regional parliament and government buildings in Crimea. Ukraine’s government, with strong backing from the West, pledges to prevent a national breakup. Mr. Yanukovych is granted refuge in Russia.

Feb. 28 — Ukraine says Russian troops have taken up positions around strategic locations on the Crimean peninsula. Ukraine’s parliament adopts a resolution demanding that Russia halt steps it says are aimed against Ukraine’s sovereignty and territorial integrity. Mr. Turchynov says he has put armed forces on full readiness because of the threat of “potential aggression.”

March 1 — Russian troops take over Crimea without firing a shot. The Kiev government and its Western supporters are powerless to react. U.S. President Barack Obama calls Mr. Putin to demand the troops’ withdrawal.

March 2 — Ukraine appeals for international help, fearing a wider Russian invasion. Supporters on both sides take to the streets of Ukrainian cities and of Moscow. The U.S. says it believes Russia has more than 6,000 troops in Crimea. The Group of Seven suspends preparations for June’s G8 summit in Russia.

March 3 — Pro-Russian troops control a ferry terminal on the easternmost tip of Crimea, adding to fears that Moscow is planning to bring in even more troops.

March 4 — Tensions ease as Putin orders troops to pull back from border

March 6 — Crimea seeks to join Russia | Crime profile (PDF)

March 12 — US House passes resolution calling for sanctions against Russia | G-7 warns Russia against splitting Ukraine

March 14 — Russia says it will protect compatriots in eastern Ukraine | Comment: The many shades of grey in Ukraine

March 15 — Ukraine accuses Russia of invasion in Crimea

March 17 — Crimea breaks away from Ukraine, asks to rejoin Russia | Comment: Why Russia needs Crimea | Moscow’s peace plan for Ukraine

March 18 — Editorial: The new Cold War | Russia suspended from G-8: France | Russia, Crimea sign accession pact

March 19 — Crimean forces storm Ukrainian navy HQ | Russia’s statute court rules accession legal

March 20 — No military action in Ukraine: Obama | Russia approves treaty on Crimea

March 20 — Russia approves treaty on Crimea | Comment: No winners in a war of sanctions

March 25 — Ukraine defence chief resigns; troops leave Crimea

March 26 — Russia takes control of all Ukranian military facilities

March 29 — Russia rules out intervention in Ukraine

April 1 — No sign of Russian troop pullback, says NATO as Russia hikes price of natural gas for Ukraine

April 9 — Ukraine issues ultimatum to pro-Russian protesters | Russia to continue gas supplies to Ukraine

April 12 — Revolt spreads in Ukraine as armed protesters seize police station

April 15 — Kiev launches armed offensive

April 16 — Kiev’s anti-terror operation flops

April 17 — Accord reached on Ukraine

April 21 — Russia vows to stop civil war in Ukraine | Russia trying to break up Ukraine: Biden | Editorial: Talking without saying

May 3 — Over 40 dead in Odessa clashes

May 7 — Russia pulls back troops from Ukraine border | Fresh fighting reported in eastern Ukraine | Four-point peace plan for Ukraine

May 8 — Ukraine separatists to go ahead with referendum despite Putin call |

May 12 — East Ukraine: Massive mandate for ‘sovereignty’ | Clashes in eastern Ukraine after residents vote for self-rule

May 24 — Ukrainian rebels opt for new state

May 25 — Ukraine votes for a new President, polling disrupted in east

May 27 — Poroshenko wins Ukraine Presidential polls, vows to crush revolt | Over 100 killed in fierce Kiev onslaught

June 7 — Poroshenko sworn in as Ukraine President | Q&A: Who is Ukraine’s new President?

June 14 — 49 dead as rebels down plane in Ukraine |

June 18 — Ukraine President offers ceasefire

June 21 — Separatists dismiss Ukraine ceasefire

June 22 — Putin calls for compromise in Ukraine

June 25 — Russian lawmakers revoke resolution on military intervention in Ukraine

July 1 — Ukraine renews attacks on rebels

July 5 — Ukraine claims victory in rebel stronghold of Slovyansk

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