महाभारत का प्रसिद्ध युद्ध हरियाणा में किस स्थान पर लड़ा गया था?

Which place in Haryana was the historic capital of the Agroha Republic (Agreya Gana)?

In Vedic and historical times, the region of Haryana was primarily situated on the banks of which sacred river?

From which inscription obtained from Pehowa is it known that Pehowa was a famous center for horse trade?