Nicholas A. Heras, the Senior Director for Strategy and Programs at New Lines Institute, told Kurdistan24 that “US military forces in Syria are far more vulnerable than those in Iraq because the US presence in Syria is forward deployed in vulnerable bases, whereas in Iraq the US forces are concentrated in more defensible bases.”
“It is comparatively easier for Iran-backed groups in Iraq to work with Assad-backed forces in Syria to target US military personnel, although in Syria the US has demonstrated that it is willing to commit significant airstrikes against forces that attack US personnel.”
Read more here: https://www.kurdistan24.net/en/story/33623-Iran-backed-groups-carry-out-two-attacks-on-US-bases-in-Syria