The Battle of Beas River took place between the Chagatai Khanate and the Mamluk Sultanate of Delhi on 9 March 1285. Ghiyas ud din Balban arranged a military defense line across the Beas River as part of his "blood and iron" fortification chain strategy at Multan and Lahore as a countermeasure against the Chagatai Khanate invasion. Balban managed to repulse the invasion. However, his son Muhammad Khan was slain in battle.
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Text from the Wikipedia article “Battle of Beas River”, available under CC BY-SA 4.0.