<Li> Turkish claims of "grey zones" of undetermined sovereignty over a number of small islets, most notably the islets of Imia / Kardak . </Li> <P> Between 1998 and the early 2010's, the two countries had been coming closer to overcome the tensions through a series of diplomatic measures, particularly with a view to easing Turkey's accession to the European Union . However, as of 2018, differences over suitable diplomatic paths to a substantial solution are still unresolved . </P> <P> Several of the Aegean issues deal with the delimitation of both countries' zones of influence in the air and on the sea around their respective territories . These issues owe their virulence to a geographical peculiarity of the Aegean sea and its territories . While the mainland coasts of Greece and Turkey bordering the Aegean Sea on both sides represent roughly equal shares of its total coastline, the overwhelming number of the many Aegean islands belong to Greece . In particular, there is a chain of Greek islands lined up along the Turkish west coast (Lesbos, Chios, Samos, and the Dodecanese islands), partly in very close proximity to the mainland . Their existence blocks Turkey from extending any of its zones of influence beyond a few nautical miles off its coastline . As the breadth of maritime and areal zones of influence, such as the territorial waters and national airspace, are measured from the nearest territory of the state in question, including its islands, any possible extension of such zones would necessarily benefit Greece much more than Turkey proportionally . </P> <P> According to a popular perception of these issues in the two countries, Turkey is concerned that Greece might be trying to extend its zones of influence to such a degree that it would turn the Aegean effectively into a "Greek lake". Conversely, Greece is concerned that Turkey might try to "occupy half of the Aegean", i.e. establish Turkish zones of influence towards the middle of the Aegean, beyond the chain of outlying Greek islands, turning these into a kind of exclave surrounded by Turkish waters, and thus cutting them off from their motherland . </P>

What island do greece and turkey fight over