Treaty of Poona (1779) explained

The Treaty of Poona was signed on 17 December 1779 between Portuguese India and the Maratha Peshwa of Satara, Madhavrao I. The treaty resulted in the Portuguese gaining right to collect revenue from Dadrá and Praganá Nagar Áveli area as compensation for the damage of a Portuguese ship called the Santa Ana. The treaty gave the Portuguese de facto control over the newly acquired territories and were added to Província do Norte (Northern Provinces). The treaty was expanded through rectifications in 1785, giving the Portuguese sole political control over the territories.^{[1] [2] [3] [4]}

Notes and References

1. Web site: Case Concerning Right of Passage Over Indian Territory (Portugal v. India.) (merits.).
2. Web site: CASE CONCERNING RIGHT OF PASSAGE OVER INDIAN TERRITORY (PORTUGAL v. INDIA).
3. Web site: Rejoinder of the Government of India.
4. Web site: Silvassa.