|Recognised regional languages||Lithian · Riyan · Liosol|
|Government||Federal parliamentary republic|
|-||Lower house||Chamber of Deputies|
208,327 sq mi
|GDP (nominal)||2016 estimate|
|Time zone||Sahar Coordinated Time (SCT+0)|
Kadya (Kadic: Kiadaséd [ˈkɑdɐséd]), officially the Kadic Federation, is a federal parliamentary sovereign state located in central Soltenna. Its territory comprises an area of 539,564 square kilometres (208,327 sq mi), dominated by humid subtropical climate in the south and by continental climate to the north, bordering Liosol to the north, Xynderland and the Rietic Mountains to the south, Riyana and Lake Soltenna to the west, and Lugida and Yerlan to the east. Being the seat of the parliament, Thiaándthina serves as the capital of Kadya, while its largest city is Eájed, as the economic center of the country.
Delian peoples, also the ancestors of modern Riyans, Lenthirites, and Melunes, entered Kadya in around 15,000 BCE. Few details were known about Kadya before conquest of Soltenna by the Avite Empire in the 4th century CE. Kadya's earliest known kingdom, the Tori Empire, was founded in 472 as a breakaway of the Avite Empire. Tori began its imperial expansion in the 9th century, successfully conquering parts of Riyana and Lugida, but was short-lived after Kingdom of (something Lenthiri) declared a joint war with three other kingdoms, leading to the eventual collapse of Tori Empire in 1013 and set foundation to the formation of the Forian Kingdom. Kads, however, successfully retained the now-Ishnief province of Kadya, securing Kads' position in the Forian Kingdom and granting Tori Empire's successor kingdoms sea access.
By nominal GDP, Kadya's economy is Soltenna's 5th largest and Sahar's ()th largest with $925 billion as of 2016. Economic growth is concentrated in the southern region especially near Eájed and areas near the capital Thiaándthina. Kadya benefited from its natural resources and cheaper labor relative to the Fordas region, from which manufacturing and mining sectors contribute to a large share of Kadya's economy, but recent times show a change in trend towards the development of content industry and startups in an attempt to catch up the economy of Kadya with its neighbor countries Lugida and Riyana. Along with the latter and Xynderland, Kadya is a founding state and a core member of Fordas, and a member of the Soltennan Council.
Kadya is located in central Soltenna, between latitudes 31° and 45° N and longitudes 7°W and 4°E. Countries bordering Kadya are Liosol to the north, Yerlan and Lugida to the east and southeast, and Riyana to the west, in addition to naval borders with Xynderland across the Amiyant Sea. Kadya has access to both the Amiyant Sea and Lake Soltenna. Acre River's watershed comprise almost all of the country, and is central to much of agriculture in an otherwise less precipitated northern region of Kadya.
The whole of Kadya excluding the Transrietic region is within the former Central Soltennan tectonic plate. Rietic orogeny that occurred 60 million years ago saw the plate's collision with the Rietic Plate from the east, forming the Rietic Mountains and part of the Golan Mountains and closing the Oculus Sea. Lake Soltenna basin was formed on the same period. With the summit reaching 3,571 m (11,716 ft) above sea level, Mount Nidarum is Kadya's highest point and is part of the Rietic Mountains. It is known for its high volcanism, particularly when its large eruption in 1860 caused crop failures in the area, including northern Kadya.
Due to Kadya's long latitudinal span, Kadya's climate varies greatly from north to south. The southern region is dominated by a humid subtropical climate with parts of Mediterranean climate near the coastline and the Riyan Lakes, receiving higher precipitation. In contrast, the northern area is less precipitated, dominated by continental climate. Temperatures in both regions average to around 20.8 °C (69.4 °F). Lowest temperature was recorded in (city), reaching −9.5 °C (14.9 °F).