The deal was signed on Sunday in the capital, Juba, following mediation by neighbouring Sudan.

Tensions between President Salva Kiir and First Vice-President Riek Machar had recently led to clashes between their respective forces.

The deal sets out terms of integrating opposition commanders into the armed forces.

President Kiir’s faction will have a 60% representation in key positions in the army, police and security forces. Mr Machar’s SPLM-IO and other opposition groups will occupy the remaining 40%.

The opposition will submit the list of their commanders within a period of one week.

It will be followed by the graduation of the unified forces and their deployment – which should not exceed a period of two months, according to the deal.

“People of South Sudan are yearning for peace and peace is about security and today we have made a milestone in that. We have agreed that we shall be moving forward,” said Major General Martin Abucha, who represented Mr Machar's faction.

“I want to call on my colleagues from the other sides that it is important to silence the guns so that South Sudan can prosper. Let there be not fighting, let there be no attacks,” he added.

The regional bloc, the Intergovernmental Authority on Development (Igad), has hailed the deal as “a major breakthrough”.