Majapahit forces under Raden Wijaya won a major victory in the Mongol invasion of Java, now considered to be the founding date of the Indonesian city of Surabaya.

Majapahit, also known as Wilwatikta, was a Javanese Hindu-Buddhist thalassocratic empire in Southeast Asia based on the island of Java. At its greatest extent, following significant military expansions, the territory of the empire and its tributary states covered almost the entire Nusantara archipelago, spanning both Asia and Oceania. After a civil war that weakened control over the vassal states, the empire slowly declined before collapsing in 1527 due to an invasion by the Sultanate of Demak. The fall of Majapahit saw the rise of Islamic kingdoms in Java.

Raden Wijaya or Raden Vijaya, also known as Nararya Sangramawijaya and his regnal name Kertarajasa Jayawardhana was a Javanese emperor and founder of the Majapahit Empire who ruled from 1293 until his death in 1309. The history of his founding of Majapahit was written in several records, including Pararaton and Negarakertagama. His rule was marked by the victory against the army and the Mongol navy of Kublai Khan's Yuan dynasty.

The Yuan dynasty under Kublai Khan attempted in 1293 to invade Java, an island in modern Indonesia, with 20,000 to 30,000 soldiers. This was intended as a punitive expedition against Kertanegara of Singhasari, who had refused to pay tribute to the Yuan and maimed one of their emissaries. However, in the intervening years between Kertanegara's refusal and the expedition's arrival on Java, Kertanegara had been killed and Singhasari had been usurped by Kediri. Thus, the Yuan expeditionary force was directed to obtain the submission of its successor state, Kediri, instead. After a fierce campaign, Kediri surrendered, but the Yuan forces were betrayed by their erstwhile ally, Majapahit, under Raden Wijaya. In the end, the invasion ended with Yuan failure and strategic victory for the new state, Majapahit.

Surabaya is the capital city of East Java province and the second-largest city in Indonesia, after Jakarta. Located on the northeastern corner of Java island, on the Madura Strait, it is one of the earliest port cities in Southeast Asia. According to the National Development Planning Agency, Surabaya is one of the four main central cities of Indonesia, alongside Jakarta, Medan, and Makassar. The city had a population of 2,874,314 within its city limits at the 2020 census. With 3,009,286 people living in the city as of mid 2023 and over 10 million in the extended Surabaya metropolitan area, according to the latest official estimate, Surabaya is the second-largest metropolitan area in Indonesia. Surabaya metropolitan is also ASEAN's 6th largest economy ahead of Hanoi. In 2023, the city's GRP PPP was estimated at US$150.294 billion.