At the height of World War II, the Middle East Relief and Refugee Administration (MERRA) operated camps in Syria, Egypt and Palestine where tens of thousands of people from across Europe sought refuge.

MERRA was part of a growing network of refugee camps around the world that were operated in a collaborative effort by national governments, military officials and domestic and international aid organizations. Social welfare groups including the International Migration Service, the Red Cross, the Near East Foundation and the Save the Children Fund all pitched in to help MERRA and, later, the United Nations to run the camps.

Displaced persons cross a bridge on the River Elbe at Tangermunde, which was blown up by the Germans, to escape the chaos behind German lines caused by the approach of the advancing Russians on May 1, 1945.

Photo: Henry Burroughs—AP / Photo colorization by Sanna Dullaway for TIME

Germans who were uprooted during the war are pictured at the Lehrter Strasse Transient Refugee Camp in Berlin on Sept. 26, 1945.

Photo: Fred Ramage—Keystone/Getty Images / Photo colorization by Sanna Dullaway for TIME

A displaced persons camp in Germany, March, 1945.

p style="margin-top: -18px; font-size:10px">Photo: Fred Ramage—Keystone/Getty Images / Photo colorization by Sanna Dullaway for TIME

The only survivors of 150 Polish people who walked from Lodz, Poland to Berlin Huddle in blankets, on December 14, 1945. They are waiting by a railway track hoping to be picked up by a British army train and given help.

Peter J. Carroll—AP / Photo colorization by Sanna Dullaway for TIME

Refugees stand in a group on a street in La Gleize, Belgium on Jan. 2, 1945. They are waiting to be transported from the war-torn town after its recapture by American forces during the German thrust into the Belgium-Luxembourg salient.

Photo: Fred Ramage—Keystone/Getty Images / Photo colorization by Sanna Dullaway for TIME

French refugees, returning to their homes in St. Pois, France after the Germans were driven out by the American forces, stop to rest at the side of the road on August 10, 1944.

Photo: AP / Photo colorization by Sanna Dullaway for TIME

A large group of refugees fleeing Paris in anticipation of the German invasion, 1940

Photo: FPG/Hulton Archive/Getty Images / Photo colorization by Sanna Dullaway for TIME

Refugees from the East of the German Reich (German Empire) around 1944-1945. Place and date unknown.

Photo: Berliner Verlag—Archiv/picture-alliance/dpa/AP / Photo colorization by Sanna Dullaway for TIME

Belgian refugees carry their belongings with them as they flee from the advancing German army in January 1945.

Photo: Allan Jackson—Keystone/Hulton Archive/Getty Images / Photo colorization by Sanna Dullaway for TIME

A family of Belgian refugees hold and support each other as they pass a military vehicle while walking the road to France, circa 1940. Behind them are other groups of refugees fleeing occupied Belgium.

Photo: Three Lions—Getty Images / Photo colorization by Sanna Dullaway for TIME

A crowd of refugees stood behind barbed wire on May 18, 1945, while waiting to cross the border into the neutral state of Lichstenstein. A thorough check by the customs office had to be performed for each of these displaced persons.

Photo: Getty Images / Photo colorization by Sanna Dullaway for TIME

A man pulls a refugee's pram, attached by a cord to his bike, up a hill in Roncey, France on August 7, 1944.

Photo: Fred Ramage—Keystone/Getty Images / Photo colorization by Sanna Dullaway for TIME

Group of passengers from the Portuguese ship Serpa Pinto, which was stopped by a German submarine and ordered abandoned off Bermuda, are shown after their arrival in Philadelphia, May 31, 1944. The U-boat officers abandoned plans to sink the vessel and permitted the passengers to re-board her after receiving wireless orders from Berlin.

Photo: AP / Photo colorization by Sanna Dullaway for TIME

H/T Time.com