Budapest is south-east of Vienna, south of Warsaw, south-west of Moscow, north of Athens, north-east of Milan, and south-east of Prague. The area of Budapest lies in Central Hungary, surrounded by settlements of the agglomeration in Pest county. The capital extends in the north-south, east-west direction respectively. The Danube enters the city from the north; later it encircles two islands, Óbuda Island and Margaret Island. The third island Csepel Island is the largest of the Budapest Danube islands, however only its northernmost tip is within city limits. The river that separates the two parts of the city is wide at its
Budapest Memorandum on Security Assurances or political independence of Ukraine, Belarus and Kazakhstan. As a result, between 1994 and 1996, Belarus, Kazakhstan and Ukraine gave up their nuclear weapons. Before that, Ukraine had the world's third largest nuclear weapons stockpile, of which Ukraine had physical if not operational control. The use of the weapons was dependent on Russian-controlled electronic Permissive Action Links and the Russian command and control system. Following the annexation of Crimea by the Russian Federation in 2014, the US, Canada, the UK, along with other countries, stated that Russian involvement was a breach of its obligations to Ukraine under the Budapest Memorandum,