Somaliland declared its independence from Somalia in 1991. It regards itself as the successor to the State of Somaliland. It is internationally recognised as an autonomous region of Somalia.
Somalia claims Somaliland as part of its sovereign territory.
The Islamic State, formerly the Islamic State of Iraq and the Levant (ISIL) and the Islamic State of Iraq and Syria (ISIS) has control much land in Iraq, Syria, Libya, Lebanon, and Nigeria. It currently has not been recognized as an independent nation by any states.
The nations of Iraq and Syria do not recognize the area controlled by the Islamic State as separate from their territory, and continue to claim the land as their own.
During the Syrian Civil War, the Islamic State was supported by Turkey and the two do not presently have conflict.
^ abKer-Lindsay, James (2012). The Foreign Policy of Counter Secession: Preventing the Recognition of Contested States. Oxford University Press. p. 53. ...there are three other territories that have unilaterally declared independence and are generally regarded as having met the Montevideo criteria for statehood but have not been recognized by any states: Transnistria, Nagorny Karabakh, and Somaliland.Cite error: The named reference "montevideo" was defined multiple times with different content (see the help page).
Somaliland
Somalia claims Somaliland as part of its sovereign territory.
Islamic State 
Iraq and 
Syria do not recognize the area controlled by the Islamic State as separate from their territory, and continue to claim the land as their own.
Turkey and the two do not presently have conflict.