I want to know the answer to the following question:
Around 70 BC, Arachosia and what other region where taken over by tribal invasion?
All the background I'm provided with is that "Around 70 BC, the western regions of Arachosia and Paropamisadae were lost to tribal invasions, presumably by those tribes responsible for the end of the Bactrian kingdom.". Is that enough to answer the question?