DAMASCUS, Syria — Unkempt government soldiers, some appearing drunk, have been deployed near a rebel-held railway station in the southern reaches of this tense capital. Office workers on 29th of May Street, in the heart of the city, tell of huddling at their desks, trapped inside for hours by gun battles that sound alarmingly close.

Soldiers have swept through city neighborhoods, making arrests ahead of a threatened rebel advance downtown, even as opposition fighters edge past the city limits, carrying mortars and shelling security buildings. Fighter jets that pounded the suburbs for months have begun to strike Jobar, an outlying neighborhood of Damascus proper, creating the disturbing spectacle of a government’s bombing its own capital.

On Sunday, the government sent tanks there to battle rebels for control of a key ring road.

In this war of murky battlefield reports, it is hard to know whether the rebels’ recent forays past some of the capital’s circle of defenses — in an operation that they have, perhaps immodestly, named the “Battle of Armageddon” — will lead to more lasting gains than earlier offensives did. But travels along the city’s battlefronts in recent days made clear that new lines, psychological as much as geographical, had been crossed.

“I didn’t see my family for more than a year,” a government soldier from a distant province said in a rare outpouring of candor. He was checking drivers’ identifications near the railway station at a checkpoint where hundreds of soldiers arrived last week with tanks and other armored vehicles.