Makassar, formerly Ujung Pandang, is the capital of the Indonesian province of South Sulawesi. It is the largest city in the region of Eastern Indonesia and the country's fifth-largest urban center after Jakarta, Surabaya, Medan, and Bandung. The city is located on the southwest coast of the island of Sulawesi, facing the Makassar Strait.

Medan is the capital and largest city of the Indonesian province of North Sumatra. The nearby Strait of Malacca, Port of Belawan, and Kualanamu International Airport make Medan a regional hub and multicultural metropolis, acting as a financial centre for Sumatra and a gateway to the western part of Indonesia. About 60% of the economy in North Sumatra is backed by trading, agriculture, and processing industries, including exports from its 4 million acres of palm oil plantations. The National Development Planning Agency listed Medan as one of the four main central cities in Indonesia, alongside Jakarta, Surabaya, and Makassar. In terms of population, it is the most populous city in Indonesia outside of the island of Java. Its population as of 2023 is approximately equal to the country of Moldova.