Europe Hits 2015 Milestone: 1M Migrants The vast majority entered by the sea in Greece By Newser Editors and Wire Services Posted Dec 22, 2015 6:32 AM CST Updated Dec 22, 2015 6:50 AM CST 22 comments Comments Macedonian border police help people pass from the northern Greek village of Idomeni to southern Macedonia. (AP Photo/Giannis Papanikos) (Newser) – A few thousand migrants and refugees made it to Greece on Monday, giving Europe a pretty big milestone: More than 1 million people have now entered the continent "through irregular means" in 2015, in what amounts to the biggest such migration since WWII, reports the Guardian. That figure is up fourfold from last year, notes the 162-nation International Organization for Migration. As anyone keeping even a cursory eye on headlines might guess, the vast majority of these newcomers—about 816,000—arrived in Greece via the sea. Most were from Syria, Afghanistan, and Iraq. The agency also says that 3,695 people drowned trying to make the trip or remain missing, reports the BBC.