Largest empire in the context of "Assyrian empire"

Assyria was a major ancient Mesopotamian civilization that existed as a city-state from the 21st century BC to the 14th century BC and eventually expanded into an empire from the 14th century BC to the 7th century BC.

Spanning from the early Bronze Age to the late Iron Age, modern historians typically divide ancient Assyrian history into the Early Assyrian (c. 2600–2025 BC), Old Assyrian (c. 2025–1364 BC), Middle Assyrian (c. 1363–912 BC), Neo-Assyrian (911–609 BC), and post-imperial (609 BC–c. AD 240) periods, based on political events and gradual changes in language. Assur, the first Assyrian capital, was founded c. 2600 BC, but there is no evidence that the city was independent until the collapse of the Third Dynasty of Ur, in the 21st century BC, when a line of independent kings starting with Puzur-Ashur I began ruling the city. Centered in the Assyrian heartland in northern Mesopotamia, Assyrian power fluctuated over time. The city underwent several periods of foreign rule or domination before Assyria rose under Ashur-uballit I in the early 14th century BC as the Middle Assyrian Empire. In the Middle and Neo-Assyrian periods, Assyria was one of the two major Mesopotamian kingdoms, alongside Babylonia in the south, and at times became the dominant power in the ancient Near East. Assyria was at its strongest in the Neo-Assyrian period, when the Assyrian army was the strongest military power in the world and the Assyrians ruled the largest empire then yet assembled in world history, spanning from parts of modern-day Iran in the east to Egypt in the west.

Bayinnaung Kyawhtin Nawrahta (16 January 1516 – 10 October 1581) was King of Burma from 30 April 1550 until his death in 1581, during the Toungoo dynasty. His reign is considered one of the most momentous in Burmese history, famously described as "the greatest explosion of human energy ever seen in Burma." During his rule, he assembled the largest empire in Southeast Asian history, which encompassed much of present-day Myanmar, as well as the Shan States, Lan Na, Lan Xang, Manipur, and the Ayutthaya Kingdom.

Though best remembered for his empire-building, Bayinnaung's most enduring legacy was the integration of the Shan States into the Irrawaddy valley administrative system. After conquering the Shan States between 1557 and 1563, he implemented a series of administrative reforms aimed at reducing the power of hereditary rulers, known as saophas, and aligning Shan governance and customs with lowland Burmese norms. These reforms effectively eliminated the persistent threat of Shan raids into Upper Burma, a source of instability since the 13th century. Bayinnaung's integration policy served as a model for successive Burmese monarchs, who continued his approach until 1885.