Under whose reign did the Gupta empire reach its greatest size

Under the reign of Chandragupta II, also known as Chandragupta Vikramaditya, the Gupta Empire reached its greatest size. He ruled from around 380 to 415 CE and expanded the empire to its peak, encompassing much of northern and central India. This period is considered the Golden Age of the Gupta Empire, marked by prosperity, cultural development, and advancements in art, science, and literature.