Sharaa and the heads of rebel factions agreed Tuesday to merge the groups under the Ministry of Defense, according to a statement from Hay’at Tahrir al-Sham (HTS), the Islamist rebel group that led the charge to topple dictator Bashar al-Assad.

Assad, old alliances have crumbled, and global powers are figuring out their relationships with Syria’s new de facto leaders.

During the course of Syria’s brutal civil war, Assad used chemical weapons more than 300 times against his own citizens, causing thousands of casualties. The worst such attack was a barrage of sarin-filled rockets launched against the Damascus suburb of Ghouta in August 2013 that killed an estimated 1,

A Pentagon spokesman said the increase was unrelated to the fall of President Bashar al-Assad to rebel forces in early December.

WASHINGTON (AP) — The United States has more than doubled the number of its forces in Syria to fight the Islamic State group — a dramatic increase that the Pentagon revealed Thursday, acknowledging that the added troops have been there for months or even more than a year.

In the past week, the Pentagon has acknowledged that its footprint in Iraq and Syria is bigger than it has claimed for years

Will he walk the walk and not just talk the talk? And if he doesn’t win in the elections, will he peacefully stand aside for whoever does win?” one analyst said.

The Pentagon announced the US currently has “approximately 2,000” troops in Syria, more than double the previously disclosed number of 900, a Defense Department spokesperson said at a press briefing on Thursday.

The high-level delegation arrived to engage in talks with Syria's interim leadership, the State Department confirmed early Friday.

Sham, or HTS, made a lightning assault across Syria. Where did the rebels get the cash, weapons and training that made their takeover possible?

"I believe there will be violent fighting, the end of which we do not know," a top Syrian Democratic Council official told Newsweek.