The Chalukyan period was marked by frequent invasions and plunder of the
neighbouring territories. There seem to be certain obvious reasons for this
feature. The state income from land seems to have been very limited, since
most of the land under the Chalukyas was rocky and not fertile. The earnings
from the trading activities also were not considerable, since trade and
commerce in India during this period was on the general decline. Hence, the
Chalukyas resorted to frequent invasions and plunder of the neighbouring
territories. The mutually destructive Chalukya-Pallava conflict can be
properly understood only in this background.
Pallavas (AD 560–903)
Controversy about Origin
Parthian Connection According to one school, they were a branch of
Parthians. But there is no evidence for the migration of the Parthians into the
Vakataka Connection Another school opines that the Pallavas were a
branch of the Brahmin royal dynasty of the Vakatakas of the Deccan. But
here again there is no direct evidence of any connection between the
Vakatakas and the Pallavas.
Indigenous Origin The third school maintains that it was an indigenous
dynasty and rose to power after the dismemberment of the Ikshvaku
kingdom. In other words, they were the indigenous Nagas.
    So the Pallavas were possibly a local tribe who established their authority
in the Tondainadu or the land of creepers.
Political History
Simhavishnu (560–90) He is considered the first important Pallava ruler,
though Pallavas existed even during the time of Samudragupta’s invasion of
south India. He is credited with capturing the territory of the Cholas and
humiliating his other southern neighbours including Ceylon. He followed
Vaishnavism, as is evident from archaeological evidence.