How quickly will this escalate?

Some 20 rockets were fired at Israeli military bases by Iranian forces from southern Syria just after midnight on Thursday, sparking the largest ever direct clash between Jerusalem and Tehran, with Israeli jets targeting numerous Iranian-controlled sites across Syria.

In response, Israel launched an extensive retaliatory campaign, striking suspected Iranian bases throughout Syria for hours following the initial Iranian bombardment, an Israeli military spokesperson said, warning Syrian dictator Bashar Assad not to get involved.