A simultaneous $1 billion covert program called Timber Sycamore conducted by the Central Intelligence Agency (CIA) aimed at fighting Syrian President Bashar al-Assad was more successful
Shortly after the start of the civil war in 2011, the Obama administration placed sanctions against Syria and supported the Free Syrian Army rebel faction by covertly authorizing Timber Sycamore under which the Central Intelligence Agency (CIA) armed and trained rebels.
>https://en.wikipedia.org/wiki/US_intervention_in_the_Syrian_civil_war
Central Intelligence Agency activities in Syria since the agency's inception in 1947 have included coup attempts and assassination plots, and in more recent years, extraordinary renditions, a paramilitary strike, and funding and military training of forces opposed to the current government.
>https://en.wikipedia.org/wiki/CIA_activities_in_Syria