Four Vedas in the chronological order are ; Rig veda, Yajur veda, Samaveda and Atharvaveda.
Six vedangas (limbs of Vedas) were evolved for the proper understanding of the Vedas.
The fifth of the six Vedangas (parts of the Vedas) is the Chhanda.
The first of the six Vedangas (parts of the Vedas) is Siksha.
The fourth of the six Vedangas (parts of the Vedas) is Nirukta.
The second of the six Vedangas (parts of the Vedas) is Kalpa.
The sixth of the six Vedangas (parts of the Vedas) is Jyotisha.
The third of the six Vedangas (parts of the Vedas) is Vyakarna.
We cannot find much trace of political history in the Vedas, but can have reliable glimpses of the culture and civilization of the Vedic period.
We cannot find much trace of political history in the Vedas.