Indian Army chief Gen Bipin Rawat arrived here today on a three-day visit to Nepal to attend its Army Day, which coincides with the 250th anniversary of the establishment of the Himalayan nation's unification. Gen Rawat is visiting Nepal at the invitation of Nepal Army chief Rajendra Chhetri. "Gen Rawat was supposed to arrive in the morning, but due to inclement weather the Indian Army chief reached Kathmandu in the afternoon," Nepal Army spokesman said. The Indian Army chief will attend as special guest a function organised by the Nepal Army to mark the Army Day, which coincides with the 250th anniversary of establishment of the country's unification. The late King of Gorkha Prithvi Narayan Shah united dozens of smaller states into a greater Nepal in 1769, when he conquered the Kathmandu valley. "There has been close and cordial relations between the Nepal Army and Indian Army for a long time and there is a tradition of inviting chiefs of Nepalese and Indian Army during special occasions," said a statement issued by the Nepal Army. Such high-level visits between the two armies will further strengthen bilateral relations and promote mutual interests, the statement said. Last year, Gen Rawat was conferred the title of honourary general of the Nepal Army by Nepalese President Bidya Devi Bhandari.