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In page Sino-Indian War:

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On 4 October, Brij Mohan Kaul, commanding IV Corps, assigned some troops to secure regions south of the Thagla Ridge.[citation needed] Kaul decided to first secure Yumtso La, a strategically important position, before re-entering the lost Dhola Post.[7] Kaul had then realised that the attack would be desperate and the Indian government tried to stop an escalation into all-out war. Indian troops marching to Thagla Ridge had suffered in the previously unexperienced conditions; two Gurkha soldiers died of pulmonary edema.[8]