Complex sentence: On October 13,1990, for the first time since the 1982 air battle, the Syrian Air force jets were allowed to enter the Lebanese air space in order to strike General Aoun military forces.
Split into simpler sentences: On October 13,1990 and for the first time since the 1982 air battle. The Syrian Air force jets were allowed to enter the Lebanese air space in order to strike General Aoun military forces.