The mass displacement of Ukrainians triggered by Russia's invasion constitutes "the fastest growing refugee crisis in Europe since World War II," according to U.N. High Commissioner for Refugees Filippo Grandi. Nearly 4 million people fled Ukraine in the first month after the February 24 invasion, and thousands have left each day since.
As of March, most fleeing Ukrainians had settled in Poland. Smaller numbers found refuge in nearby Hungary, Slovakia, and Germany. Ukraine's tiny neighbor and Europe's poorest country, Moldova, has welcomed more than 350,000 Ukrainian refugees.
