Explanation: The earliest Satavahana inscriptions belong to the 1st century BCE, when they defeated the Kanvas and established their rule over parts of central India.

• It is also pertinent to note that the early Satavahana kings appeared not in Andhra but in north Maharashtra (the fertile basin of the upper Godavari valley), where their earliest coins and inscriptions have been found. Gradually, they extended their power over Karnataka and Andhra.
• Their greatest competitors were the Shaka Kshatrapas of Western India, who had established themselves in the upper Deccan and western India.
• Control of the prominent seaports such as Bhrigukachcha (Broach), Kalyan, and Suparaka (Sopara) must have been a bone of contention between the two.

Source: Tamil Nadu NCERT