After Alaungpaya's death, the new Burmese king Naungdawgyi was embroiled in several rebellions, including that of Gen. Minkhaung Nawrahta, and could not resume the war. The war was inconclusive. For all their work, the Burmese gained little of their original objectives. Siam very much remained a thorn to the stability of Burmese peripheral regions. In the following years, Siam continued to provide support to Mon rebels in the south who raised a major rebellion in 1762 as well as those in Lan Na in the north . The only lasting territorial gain the Burmese achieved was the upper Tenasserim coast, on which they previously had only a nominal claim.  Although the Siamese troops no longer openly intruded the border, the Mon rebels continued to operate from the Siamese territory. In 1764, the Mon governor of Tavoy, who was made governor by Alaungpaya only four years earlier, revolted until it was put down in November 1764. Likewise, the instabilities in Lan Na resumed soon after the Burmese army left in February 1764, forcing the army to return again later in the year. The inconclusive nature of the war would lead to the next war in 1765.
Question: Which happened first, the rebellion of the Mon rebels, or the Burmese capturing the upper Tenasserim coast?
Answer: Mon rebels