In August 1999 , an armed incursion of 1,500 Islamic radicals , led by Chechen warlord , Shamil Basayev , and Arab jihadist , Ibn al-Khattab , in support of a Dagestani separatist movement , combined with a series of apartment bombings in Russia , gave Moscow sufficient reasoning for re-invading Chechnya , thus triggering the Second Chechen War , a conflict fought with significant jihadist overtones
apartment bombings
Russian apartment bombings
Insurgency in the North Caucasus