Pro-regime media outlets mourned 42 troops, including 11 officers, who had been killed by the Islamic State in the Syrian desert last June.
The desert, also known as Badiya, extends over 90,000 square kilometres (35,000 square miles) from central Syria to the borders with Iraq and Jordan to the east and southeast.
The clashes have taken place near the ancient city of Palmyra and along the border line with Iraq southeast Syria.
Last week, the commander of regime army in al-Badiyat M.General Fuad Khaddour killed in al-Arak area near Palmyra desert, 26 miles, 40 km east of Homs city, according to pro-regime media.
Liwa al-Quds, pro-regime militia fighting the Islamic State in the Syrian Desert has also mourned 17 militants killed in clashes with ISIS northeast Palmyra, according to statement posted online.
The Iran-backed militia said its fighters, mostly Palestinians, had played key role in the Syrian army advances in the last few weeks that enabled the regime for the first time to reach the border with Iraq and to take ground in Deir Ezzor and Raqqa provinces
