Breaking through the city gates, the Ladakhis overcame Guge's resistance and took control of the lower part of the citadel.
But as they chased the retreating soldiers and citizens of Guge up to passage ways and tunnels to its summit, the Ladakhis found themselves sitting ducks.
As they snaked towards the summit these passage ways narrowed.
The Ladakhis had to pass through them almost single file, making them easy targets for Guge's forces.
After taking heavy losses, the Ladakhis retreated to the lower ramparts to regroup.
It became clear to the Ladakhis that a front assault on the citadel would be impossible.
Instead, they chose to sit and wait.
By surrounding the citadel, the Ladakhis were confident they had blocked all avenues of escape and fresh supplies, especially water.
How long could Khri bKra shis Grags pa lde and his people hold out in this dry environment?
But unknown to the Ladakhis, Guge might have had a trickle to up its sleeve.
Deep beneath the citadel are the network of caves that John Bellezza and Tsering Gyalpo found to be most unusual.
These were originally thought to be a royal winter retreat.
To escape the bitter cold of winter, scholars believed the royal's family would have come here to keep warm.
But as John and Tsering explore further, they find evidence that suggests that these caves may have had some other purposes.