Original: Invasion of India (180 BCE onward) The Vanaparava of the Mahabharata contains verses in the form of prophecy that the kings of the Shakas, Yavanas, Kambojas, Bahlikas and Abhiras, etc. shall rule unrighteously in Kaliyuga (Mahabharata 3/188/34-36).
Simplified: Invasion of India (180 BC onward) The Vanaparava of the Mahabharata has a prophecy saying that the kings of the Shakas, Yavanas, Kambojas, Bahlikas and Abhiras, etc. shall rule unrighteously in Kaliyuga (MBH 3/188/34-36).