"On this occasion, I commend our sons of the armed forces who have sacrificed in the war on terror," the prime minister, who is backed by the United Nations (UN), said in a statement.
The prime minister praised the "armed forces who, despite the division and lack of equipment, stand valiantly alongside the security forces against the terrorists, mercenaries, smugglers, and human traffickers, who are trying to tamper with the stability of the homeland."
"We stress again the necessity to unify the military establishment. A united army is the basis of a united homeland. It expresses the national unity of our people of all walks of life and in all areas," the statement said.
Since the fall of former leader Muammar Gaddafi's government in 2011, Libya has been suffering insecurity and political division between two governments, which are both competing for legitimacy.
Since last year, the Egyptian capital Cairo has been hosting extensive meetings of Libyan military officials in order to unite the Libyan army.
The Royal Libyan Army was formed after Libya gained its independence in 1951. Currently, the Libyan government is re-establishing the country's national army after its Gaddafi-led national army was defeated and disbanded.