Prithvi Narayan Shah was occupied with Nuwakot, Tanahun, a small kingdom to the west, took advantage of the king's absence to invade the Gorkha kingdom. Tanahun troops crossed the Chepe river and captured Sirhanchowk.[4] But reinforcements from both Nuwakot and Gorkha managed to rout the invaders and considerably weaken Lamjung.Answer:
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