Ilyas Shah maintained an army of 90,000 cavalry and many elephants. In 1346, As the ruler of
Satgaon, Ilyas Shah led the very first
Muslim army into
Nepal. where Ilyas had constructed a large fort and urbanised the area. Ilyas then thrust through the
Terai plains with his army, into the
Kathmandu Valley ruled by
Jayaraja Deva. His army sacked the temple of
Swayambhunath and looted
Kathmandu city for three days, returning to
Bengal with plentiful spoils. None of the existing buildings in Kathmandu valley predates the raid. However, the temple of Changu Narayan was never sacked as the Islamic forces could never locate the temple. Ilyas Shah then invaded
Orissa, which was ruled by Bhanudeva II of the
Eastern Ganga dynasty. He further sacked
Jajpur,
Cuttack and reached as far as the
Chilika Lake. The
Jagannath Temple was also desecrated during the invasion. He also led a successful campaign against the
Kamarupa kingdom in present-day
Assam, being the first Muslim king to capture
Guwahati. Ilyas Shah also founded the city of
Hajipur and first settled in 1350 AD. In November 1353, the Delhi Sultan
Firuz Shah Tughluq launched an invasion of Bengal. His army occupied Pandua. Ilyas Shah and his forces retreated to the fortress of Ekdala. The Delhi Sultan laid siege to the fortress for two months. The Delhi Sultanate's forces then began withdrawing. Ilyas Shah began to pursue the Delhi army and reached as far as
Varanasi. The Delhi army formidably fought back. Firuz Shah returned to Delhi in 1355. Ilyas Shah regained control of Bengal and his realm extended up to the
Koshi River. This led to him being styled as "the second
Alexander" in the same manner as
Alauddin Khalji. ==Death==