Which one among the following is common to the treaty of Yandaboo (1826), the treaty of Salbai (1782) and the treaty of Gandamak (1879) ?

The Treaty of Yandaboo (1826), the Treaty of Salbai (1782), and the Treaty of Gandamak (1879) were pivotal instruments that enabled the British to consolidate control over South Asian powers. The Treaty of Salbai concluded the First Anglo-Maratha War, ensuring twenty years of peace and securing British possession of Salsette [2]. The Treaty of Yandaboo ended the First Anglo-Burmese War, forcing Burma to cede territories like Assam and Arakan, effectively ending Burmese independence and removing them as a threat to British India [t4][t6]. The Treaty of Gandamak, following the Second Anglo-Afghan War, mandated that the Amir of Afghanistan conduct foreign policy under British advice and accept a permanent British resident in Kabul [c3]. Collectively, these treaties were 'unequal' or punitive agreements that expanded British strategic influence, established vassalage, and secured frontiers against regional rivals [c4][t5][t10].

Sources

1. [2] https://en.wikipedia.org/wiki/Treaty_of_Yandabo