I want to know the answer to the following question:
The decline of what empire allowed the rule of the Kabul Shahi empire?
All the background I'm provided with is that "The Kabul Shahi dynasties ruled the Kabul Valley and Gandhara (modern-day Pakistan and Afghanistan) from the decline of the Kushan Empire in the 3rd century to the early 9th century.". Is that enough to answer the question?
Answer: yes