Complex sentence: However, the order was suspended in May 2009 reportedly either due to Israeli pressure or lack of Syrian funds Then on 15 august 2015 6 Mig-31 were delivered to the Syrian Arab Air Force.
Split into simpler sentences: However, the order was suspended in May 2009 reportedly either due to Israeli pressure or lack of Syrian funds. On 15 August 2015, six MiG-31s were delivered to the Syrian Arab Air Force.