Question

conclusion of later vedic polity

Answer 1

In later Vedic times, the vid Atha completely disappeared. The Sabha and Samiti continued to hold the ground, but their character changed. Women were no longer permitted to sit in the Sabha, and it was now dominated by nobles and Brahmanas. The formation of wider kingdoms made the king more powerful. Tribal authority tended to become territorial. The term Rashtra, which indicates territory, first appears in this period. The King performed the Raja Suya sacrifice, which was supposed to confer supreme power to him. He performed the asvamedha, which meant unquestioned control over an area in which the royal house ran uninterrupted. He also performed the Vaja Peyia or the chariot race, in which the royal chariot was made to win the race against his kinsmen. During this period collection of taxes and tributes, the king officer called sangrihitri. 
Even in later Vedic times, the king did not possess a standing army. Tribal units were mustered in times of war, and, according to one ritual for success in war, the king had to eat along with his people from the same plate.