More than 80,000 soldiers and other pro-regime fighters have been killed in the four-year-old conflict, out of a total of roughly 220,000 dead, according to the Syrian Observatory for Human Rights.
"I'm with the regime but I am a deserter, because military service in Syria means death," said George, a Christian student from Damascus.
"Very few young men accept to enlist because at our age, no one wants to die."
As the territory that has fallen out of regime control is predominantly Sunni Muslim, the government is heavily recruiting from among the Druze, Christian, Alawite, and Ismaili minorities.
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"Even if they support the army and the regime, they're not willing to serve its flag," said Sema Nassar, a human rights activist from the northwest province of Latakia, a heartland for the Alawite sect from which Assad hails.
"Everyone without exception is discontent. After four years of an ugly war, who isn't unhappy?"
Faced with a "war of attrition... The government must use considerable coercion" to replenish its ranks, said Joshua Landis, director of the Centre for Middle East Studies at the University of Oklahoma.
Sunni Muslims make up about 80 per cent of Syria's population, while Alawites constitute roughly 10 per cent.
Syrian men by law are required to serve a two-year military service, which can be extended for much longer.
Hit by defections and desertions, Syria's 300,000-strong military has halved in size since 2011, according to Aram Nerguizian, a military affairs expert from the Centre for Strategic and International Studies.
To reverse the trend and snare draft dodgers, military police have redoubled their efforts.
He said security forces also stand guard at university gates to screen male students and teachers.