Sudan People's Liberation Army (SPLA) forces at the frontline in Tachuien, Unity State, South Sudan on Friday, May 11, 2012. In late April,&lt;br /&gt;&lt;br /&gt;&lt;br /&gt;&lt;br /&gt;&lt;br /&gt;&lt;br /&gt;&lt;br /&gt;&lt;br /&gt;&lt;br /&gt;<br />  tensions between Sudan and South Sudan erupted into armed conflict along their poorly defined border. Thousands of SPLA forces have been deployed to Unity State where the two armies are at a tense stalemate around the state&#8217;s expansive oil fields. Fighting between the armies lulled in early May after the U.N. Security Council ordered the countries to resume negotiations. South Sudan seceded from the Republic of Sudan in July 2011 following decades of civil war. (AP Photo/Pete Muller)&#8221; width=&#8221;512&#8243; height=&#8221;341&#8243; /></div> <div>Sudan People&#8217;s Liberation Army (SPLA) forces at the <span id=
{}