<prompt> Translate the following text to EnglishKatika karne ya 15 ilikuwa bandari muhimu zaidi ya Asia ya Kusini-Mashariki, na meli 2,000 zilikuwa zimesimama huko wakati sultans wa mji huo walipanua eneo lao kutoka kwa utajiri wa biashara hadi Pahang na Singapore na hata pwani ya mashariki ya Sumatra.  <response>: In its glorious 15th-century heyday, it had been the most vital port in Southeast Asia, with as many as 2,000 ships docked as the citys sultans expanded their territorial reach from the wealth of trade to as far as Pahang and Singapore and even to the east coast of Sumatra. 