Yambol is a city in southeastern Bulgaria, an administrative centre of Yambol Province. It lies on both banks of the Tundzha river in the historical region of Thrace. It is occasionally spelled Jambol. The administrative centres of two municipalities are situated in Yambol. One is of the rural area of Tundzha Municipality and the other is of the homonymous Yambol Municipality that embraces the city itself. Yambol Peak on Livingston Island in the South Shetland Islands, Antarctica is named after Yambol. In modern times Yambol, was a center of the Yambol okolia since 1878, then Yambol okrug since 1948. In 1984 it became part of the newly formed Burgas Oblast where it remained for 10 years. Since the early 1990s Yambol is the center of Yambol oblast. The city was affected by the turmoils of the early 20th century. I Some Bulgarian refugees from East Thrace, attacked by the Turkish Army in The Destruction of Thracian Bulgarians in 1913, settled in the town. Its Greek population (around 20 families) left during the exchange of populations. It also hosted Bulgarian Macedonian refugees from the failed 1903 Ilinden Uprising. During World War I, Yambol hosted a base for Luftstreitkrafte (Imperial German Army Air Service) zeppelins used for missions in Romania, Russia, Sudan and Malta. The town was chosen by the Germans due to its favorable location and weather conditions. In the early 21st century, the city became the first one in Bulgaria to use natural gas for domestic purposes.