Between 2007 and 2011, large numbers of migrants from the Middle East and Africa crossed between Turkey and Greece, leading Greece and the European Border Protection agency Frontex to upgrade border controls.
在2007年至2011年間，大量來自中東和非洲的無證件移民從土耳其進入希臘，促使希臘與歐洲邊境保護機關欧洲边境和海岸警卫队加強邊境管制。