Complex sentence: Treaty is the English translation of Sandhi which means a formally concluded and ratified agreement between states.So the two state did the treaty for the land of "Kharka" which eventually contributed to create the name of Sandhikharka, the headquarter of Arghakhanchi district.
Split into simpler sentences: Treaty is the English translation of Sandhi which means a formally concluded and ratified agreement between states. The two states created the treaty for the land of "Kharka" which eventually lead to the name of Sandhikharka, the headquarter of Arghakhanchi district.