Tensions over oil and security brought the two sides to the brink of war last April.
Soon after the split, tensions between the old foes escalated over outstanding issues, coming close to an all-out war in April.
Since South Sudan's independence, tension between the new neighbours has been strained, with rebellions breaking out on either side of the border and a dispute over oil which escalated to the brink of war last April.
More than half of Vietnam's 70 million people were born after the war ended on April 30, 1975.
He had previously been charged with murder, but the court in the southern Serbian town of Prokuplje upgraded the indictment to war crimes in April.
Petraeus' observations were similar to those he made when he testified before congressional committees in April about the status of the war effort.
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Tax collections, despite the sharp increases in rates, were held down by recessions and widespread unemployment, which in April hit a post-World War II high of 9.4% of the labor force.
As the war broke out in April 1992, Sarajevo was besieged and hundreds of thousands of Muslims and Croats were driven out of areas that Mr Karadzic intended to secure for his Republika Srpska.
When Dish Network won a bidding war for Blockbuster back in April, many wondered what a satellite provider wanted with a dying DVD chain.
Petraeus is scheduled to appear before Congress in April to testify about the progress of the war, which began five years ago Wednesday.
Senate Democrats, meanwhile, vote in committee Thursday on their own war spending bill, with an April 2008 deadline for withdrawing most combat troops from Iraq.
Kayani warned in a speech in April that there should be no wavering in the war against the militant group, known as Tehrik-e-Taliban Pakistan.
About 47 percent of voters now say it was right to go to war, compared with 64 percent in April and 58 percent in June, according to the survey published in The Times of London.
Domenico Quirico, 62, an experienced war reporter, entered Syria from Lebanon on 6 April saying he would be out of touch for a week.
In April 1917, President Woodrow Wilson led the United States into World War I.
And last April, Sudan and South Sudan slipped close to all-out war in series of air and ground exchanges.
In April, the Congolese government called for Ntaganda's arrest for war crimes, sparking clashes as forces loyal to him deserted the national army.
Political uncertainty and fear were off the charts, as Vice President Spiro Agnew resigned in November 1973 and Nixon in August 1974, while the Vietnam War was heading for its final, ugly conclusion in April 1975.
In April, Sudan and South Sudan slipped close to all-out war with a series of tit-for-tat air raids and ground attacks that prompted the African Union and Security Council to push the two sides to act.
Bush reminded Congress, which is on spring recess until April 16, that it has been 57 days since he first requested war funds.
He came home on leave in early April and his sister, Katie, says it was clear that the war weighed heavily on her brother's mind.
Richardson, a former U.S. ambassador to the United Nations, has traveled to North Korea several times, most recently in April 2007 to secure the return of the remains of American soldiers killed during the Korean War.
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April 23, 1995: The United Nations International Criminal Tribunal names Karadzic and Mladic as suspected war criminals.
On April 30, DirecTV scored what should have been a decisive victory in the company's ongoing war with satellite pirates.
Immediately after the fall of Saddam Hussein's regime in April 2003, some 100, 000 Iraqi exiles who had lived in Iran since the Iran-Iraq war in the 1980s entered the city.
In its landmark ruling in April, the court - set up in 2002 to try those who bore the greatest responsibility for the war in which some 50, 000 people were killed - found Taylor guilty on 11 counts, relating to atrocities that included rape and murder.
Even after the cold war ended and outsiders stopped backing the rebels, they fought on, with occasional interruptions, until April this year.
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