The United States and its allies yesterday called for an immediate de-escalation of tensions in Libya. They warned any military action would have consequences after Libyan army commander Khalifa Haftar ordered forces to advance on Tripoli,  the capital of the UN-backed government, in Libya. <br />''<br />''The United States, France, Britain, Italy and the United Arab Emirates in a joint statement in Washington said they  oppose any military action in Libya and will hold accountable any Libyan faction that precipitates further civil conflict. <br />''<br />''The statement further said military posturing and threats of unilateral action will only risk propelling Libya back toward chaos.<br />''<br />''Dozens of militias have fought for control of the North African country since a NATO-backed uprising toppled and killed longtime dictator Muammar Gaddafi in 2011.<br />''<br />''<span style="color: #222222;">Haftar's forces have emerged as a key player, opposing the government in Tripoli and backing a parallel administration in the east.</span><br />