Kakatiya Empire and Islam – conquest and unparalleled fightback
The Kakatiyas were a tough nut to crack for the Islamic Armies from the start. But, the spectacular speed with which Kakatiya Empire collapsed was actually the reason why Delhi Sultanates weren't able to gain a foothold in the South - simply put, the Empire disappeared but not it's armies. The resistance the armies put meant that Delhi Sultanate wasn't able to set it's foot in the territory for the next 300-350 years.