July 9, 2011 - South Sudan becomes an independent nation, with a population of approximately eight million people.
July 14, 2011 - Becomes the 193rd member nation of the United Nations.
July 29, 2011 - South Sudan is admitted to the African Union.
August 18, 2011 - Continuing violence between Murle and Lou Nuer ethnic groups leaves 600 people dead and approximately 200 people missing in the eastern province of Jonglei.
September 8, 2011 - According to U.N. officials, the governments of Sudan and South Sudan reach an agreement that will allow the withdrawal of their troops from the disputed border region of Abyei.
October 2011 - In his first visit to Khartoum since South Sudan's independence, President Salva Kiir meets with Sudanese President Omar al-Bashir to "reach final solutions" to address continuing differences between their countries.
January 4, 2012 - South Sudan's Council of Ministers declares Jonglei state a "humanitarian disaster area" and calls on international aid agencies to provide urgently needed humanitarian assistance.
January 23, 2012 - South Sudan shuts down oil production after accusing Sudan of stealing $815 million of its oil. Sudan says it confiscated the crude to make up for unpaid fees to use the pipeline and processing facilities in its territory.
February 10, 2012 - During talks mediated by the African Union, Sudan and South Sudan sign a nonaggression pact aimed at bringing peace to the border region.
April 12, 2012 - South Sudan forces claim the oil fields in the town of Heglig, which account for about half of Sudan's oil production.
April 20, 2012 - South Sudan announces the withdrawal of its troops from the contested, oil-rich area of Heglig. Sudan claims that the South Sudan troops were "forced to withdraw."
May 2012 - President Salva Kiir writes letters to more than 75 government officials and to eight foreign governments in an attempt to recover $4 billion lost to corruption. "If funds are returned, the government of the Republic of South Sudan will grant amnesty and keep your name confidential," writes Kiir in a letter sent to former and current "senior" officials.
May 30, 2012 - The U.N. peacekeeping mission confirms the full withdrawal of the Sudan Armed Forces from the disputed Abyei region but adds that Sudanese armed police forces remain in the area.
August 4, 2012 - African Union officials announce that negotiating teams from Sudan and South Sudan have agreed to end a dispute on oil payments to allow the resumption of southern oil exports through Sudan's territories.
September 27, 2012 - Sudanese President Omar al-Bashir and South Sudanese President Salva Kiir sign a deal to resume oil exports and establish a demilitarized zone and principles of border demarcation but do not reach a deal on the status of Abyei, a disputed region claimed by both countries.
March 8, 2013 - Defense ministers from Sudan and South Sudan sign an agreement to soon withdraw their respective military forces from the 14-mile-wide demilitarized zone between the countries.
June 9, 2013 - Sudanese President Omar al-Bashir orders the shutdown of an oil pipeline running from South Sudan, explaining that he doesn't want South Sudan to use oil funds to arm "mercenaries, traitors and agents."