Under the Walls of Konya Muhammad Abd al-Nasser

Is it possible for a city alone to change the course of a nation's history or a specific era? The city of Konya did even more than that, for it is under its walls that a battle will take place, changing history entirely. As a result of that battle, there will be a beginning and an end – an end to fragmentation and dispute, and a beginning of unity and conquests. So, what happened under the walls of Konya?