Is Korea the only divided country in world?

No, Korea is not the only divided country in the world. There are several other divided countries, including:

1. Cyprus: Cyprus is divided into two main regions: the Republic of Cyprus, which is internationally recognized, and the Turkish Republic of Northern Cyprus, which is recognized only by Turkey. The division occurred in 1974 after a Turkish military intervention in response to a coup d'état by Greek Cypriots.

2. India and Pakistan: India and Pakistan were once a united country known as British India. However, the two countries were partitioned in 1947 along religious lines, with predominantly Hindu areas becoming India and predominantly Muslim areas becoming Pakistan. Kashmir, a region in the Himalayas, is disputed between India and Pakistan and is also divided between the two countries.

3. Somalia: Somalia has been divided into several regions since the collapse of the central government in 1991. These regions include Puntland, Somaliland, and Jubaland, which are all self-declared autonomous states.

4. Ukraine: Ukraine is divided into two main regions: the eastern regions of Donetsk and Luhansk, which are controlled by pro-Russian separatists, and the rest of the country which is controlled by the Ukrainian government. The conflict in Ukraine began in 2014 and is ongoing.

5. Georgia: Georgia is divided into two main regions: Abkhazia and South Ossetia, which are both breakaway regions that are not recognized by most of the international community.

6. Sudan: Sudan was divided into two countries, Sudan and South Sudan, in 2011 after a long civil war. South Sudan is the world's newest country.