Since the Chin showed their military prowess by inflicting some losses on the invading forces, the British Army took the Chin seriously.
General Sir George White Commander-in-Chief of Burma, personally went to supervise the expedition.
He arrived in Kanpale (near Kalaymyo) on 30 December 1888 and joined the expedition force.
The Chin warriors built a stockade at Leisan Mual (Red Rocky Gate) and stood firm.
On 27 January 1889, the Chin warriors attacked the road workers and the British sent their troops to engage the Chin warriors.
The Chin warriors gave strong resistance but the superior British fire power forced the Chin warriors to retreat.
The Chin warriors then stood firm at Leisen Mual stockade which was the last line of defence.
The British couldn’t take the stockade initially, so reinforcements were ordered and the British charged the stockade again and the stockade fell.
As the last line of defence was breached by the superior British force, the door to the Sizang valley was wide open.
The British forces marched to Leisang range, from where they could see the villages within Sizang valley.
General Sir.
George White described his experience of the battles with the Chin as "Enemy yesterday attacked our working 1 party on road above this and held our covering party, 40 British and loo Gurkhas, from 9 till 3, when I arrived and ordered their positions to be charged.
We carried all, driving them entirely away, getting off ourselves wonderfully cheaply.
Only one Norfolk dangerously wounded.
Enemy in considerable numbers, using many rifles and plenty ammunition.
They fired at least 1,000  rounds, standing resolutely until actually charged, even trying to outflank us.
Their loss probably about eight or ten, but they were carried down the khuds at once.
Most difficult enemy to see or hit 1 ever fought".

The battle at Leisen Mual was a serious blow to the Chin and they realized that it was impossible to save their villages.
The leader Pu Khai Kam then burned his capital Khuasak before the arrival of the British, then moved to the jungle to start Guerrilla warfare.
At the same time, the Chin warriors of the Sizang, Kamhau, Sukte and Khuano were assembling at Buanman.
The British saw the assembly and they fired their artillery at Buanman.
The cannon balls exploded spectacularly, leading the Chin to realise that they fought a far superior force and they lost the heart to resist.
By February 1889, the British captured Khuasak, Buanman and Thuklai.
A military post Fort White was established in honour of General George White.
The British expedition force then burned the whole of Sizang villages as Carey & Tuck wrote in the Chin Hills: by 6 March 1889, not a single Sizang village remained in existence.
The destruction of Sizang villages was accomplished with a good deal of firing, but very little damage to life and limb.

Although the Chin people were beaten by a far superior force and driven out of their villages, they showed no sign of surrender and attacked British posts whenever they had an opportunity.
 They ambushed British posts, cut telegraph cables and stole cattle from the British whenever possible.
The Sizang resisted the British from the forest for two years.
Since the Chin showed their military prowess by inflicting some losses on the invading forces, the British Army took the Chin seriously. General Sir George White Commander-in-Chief of Burma, personally went to supervise the expedition. He arrived in Kanpale (near Kalaymyo) on 30 December 1888 and joined the expedition force. The Chin warriors built a stockade at Leisan Mual (Red Rocky Gate) and stood firm. On 27 January 1889, the Chin warriors attacked the road workers and the British sent their troops to engage the Chin warriors. The Chin warriors gave strong resistance but the superior British fire power forced the Chin warriors to retreat. The Chin warriors then stood firm at Leisen Mual stockade which was the last line of defence. The British couldn’t take the stockade initially, so reinforcements were ordered and the British charged the stockade again and the stockade fell. As the last line of defence was breached by the superior British force, the door to the Sizang valley was wide open. The British forces marched to Leisang range, from where they could see the villages within Sizang valley. General Sir. George White described his experience of the battles with the Chin as "Enemy yesterday attacked our working 1 party on road above this and held our covering party, 40 British and loo Gurkhas, from 9 till 3, when I arrived and ordered their positions to be charged. We carried all, driving them entirely away, getting off ourselves wonderfully cheaply. Only one Norfolk dangerously wounded. Enemy in considerable numbers, using many rifles and plenty ammunition. They fired at least 1,000  rounds, standing resolutely until actually charged, even trying to outflank us. Their loss probably about eight or ten, but they were carried down the khuds at once. Most difficult enemy to see or hit 1 ever fought".
The battle at Leisen Mual was a serious blow to the Chin and they realized that it was impossible to save their villages. The leader Pu Khai Kam then burned his capital Khuasak before the arrival of the British, then moved to the jungle to start Guerrilla warfare. At the same time, the Chin warriors of the Sizang, Kamhau, Sukte and Khuano were assembling at Buanman. The British saw the assembly and they fired their artillery at Buanman. The cannon balls exploded spectacularly, leading the Chin to realise that they fought a far superior force and they lost the heart to resist. By February 1889, the British captured Khuasak, Buanman and Thuklai. A military post Fort White was established in honour of General George White. The British expedition force then burned the whole of Sizang villages as Carey & Tuck wrote in the Chin Hills: by 6 March 1889, not a single Sizang village remained in existence. The destruction of Sizang villages was accomplished with a good deal of firing, but very little damage to life and limb.
Although the Chin people were beaten by a far superior force and driven out of their villages, they showed no sign of surrender and attacked British posts whenever they had an opportunity.  They ambushed British posts, cut telegraph cables and stole cattle from the British whenever possible. The Sizang resisted the British from the forest for two years.
Siallum Fort