In 1353, Firoz Shah launched a campaign against Bengal, then
ruled by Shamsuddin Ilyas Shah, and established a camp on the banks of the Kosi
River with a force exceeding seventy thousand men. During this expedition, the
ruler of Gorakhpur submitted to Firoz Shah’s authority and paid a tribute of
more than twenty thousand tankas. After crossing the Kosi River, Firoz Shah’s
advance compelled Shamsuddin Ilyas Shah to retreat with his army to Ekdala in
present-day West Bengal. Firoz Shah subsequently laid siege to the fortress but
deliberately staged a withdrawal, prompting Shamsuddin Ilyas Shah to leave
Ekdala and pursue what he believed to be a retreating enemy. In a calculated
maneuver, the Sultan’s forces were secretly divided into three divisions, which
then launched a coordinated attack on the Bengal army. This engagement
reportedly resulted in heavy losses for Shamsuddin Ilyas Shah and forced his
eventual withdrawal.
Two years after this first Bengal campaign, Firoz Shah
founded the city of Hisar. Prior to his second invasion of Bengal, he also
established the city of Firozabad on the
banks of the Yamuna River.
In the period leading up to the second campaign, the ruler
of Sonargaon was killed by Shamsuddin Ilyas Shah, prompting his son-in-law,
Zafar Khan, to flee to Firoz Shah’s court at Hisar. Preparations were soon made
in Delhi to support Zafar Khan’s claim and seek redress. Upon learning of Firoz
Shah’s military preparations, Shamsuddin Ilyas Shah abandoned Ekdala and moved
further east to Sonargaon in search of a more secure position. In 1358, Firoz
Shah marched toward Bengal with an army of approximately seventy thousand men,
and during this expedition he founded the city of Jaunpur, naming it
in honor of Muhammad bin Tughluq, the second sultan of the Tughluq dynasty.
During the course of this campaign, Shamsuddin Ilyas Shah
died and was succeeded by his son, Sikandar Shah, who was subsequently besieged
at Ekdala by the Delhi forces. The conflict concluded with a peace treaty under
which Sikandar Shah agreed to restore Zafar Khan’s dominion over Sonargaon, a
condition that was accepted by both sides.
On his return from Bengal, Firoz Shah encountered resistance
from the Rai of Jajpur
in present-day Odisha.
In 1360, he invaded the region, capturing prisoners and seizing spoils of war,
including horses and cattle. The Rai of Odisha ultimately surrendered and sued
for peace, agreeing to pay an annual tribute of twenty elephants.