Battle of Mulleriyawa
1559 CE.
Shown on the map at 6.936°, 79.948°.
The Battle of Mulleriyawa (Sinhala: මුල්ලේරියාව සටන) in 1559 was part of the Sinhalese–Portuguese War. It was one of the most decisive battles in Sri Lankan history and considered as the worst defeat of the Portuguese during that period. According to local chronicles, the marshlands of Mulleriyawa turned red with blood after the annihilation of the Portuguese. With this victory, Sitawaka emerged as a military power which was able to challenge the Portuguese expansion.
Text from the Wikipedia article Battle of Mulleriyawa, licensed CC BY-SA 4.0.