The battle fought in 1520 between the Vijayanagara Empire and the Sultanate of Bijapur was a significant event in the history of South India. This battle was fought for the control of a particular region that is located at the confluence of the Krishna and Tungabhadra rivers.

Importance of the Region:
- The region at the confluence of the Krishna and Tungabhadra rivers was strategically important due to its geographical location. It provided access to trade routes and was a center of economic and political significance.
- The control over this region would have given the victorious side a stronghold in the area and the ability to exert influence over the surrounding territories.

Vijayanagara Empire vs. Sultanate of Bijapur:
- The Vijayanagara Empire was a powerful Hindu empire that ruled over South India from the 14th to the 17th century. It was based in the city of Vijayanagara (present-day Hampi) and had a strong military and cultural influence in the region.
- The Sultanate of Bijapur was a Muslim kingdom that was established in the Deccan region of South India. It was one of the five Deccan Sultanates, and its capital was Bijapur (present-day Vijayapura).
- The battle between these two powers was part of a larger conflict for control over the Deccan region, and the region at the confluence of the Krishna and Tungabhadra rivers was a strategic target.

Geographical Significance:
- The confluence of the Krishna and Tungabhadra rivers is located in present-day Andhra Pradesh, India. This region is known for its fertile land and agricultural productivity.
- The Krishna River is one of the major rivers in South India and flows through the states of Maharashtra, Karnataka, and Andhra Pradesh. It is an important water source for irrigation and supports the agricultural activities in the region.
- The Tungabhadra River is a tributary of the Krishna River and flows through the states of Karnataka and Andhra Pradesh. It also plays a crucial role in the irrigation and agricultural practices of the region.

Conclusion:
The battle fought in 1520 between the Vijayanagara Empire and the Sultanate of Bijapur was for the control of the region at the confluence of the Krishna and Tungabhadra rivers. This region held immense geographical and strategic significance due to its access to trade routes and its fertile lands supported by the Krishna and Tungabhadra rivers. The outcome of this battle would have had a significant impact on the balance of power in the region.