This article originally appeared on Forbes.

The tragic conflict that is currently ravaging Ukraine has precipitated one of the biggest refugee crises in Europe since World War II. At present, an estimated 4.3 million people have fled their homes in Ukrainian towns and cities and escaped across the borders of neighboring countries. This mass exodus of civilians escaping war and the reality of a twenty-first century conflict in a developed region have brought into sharp focus the indispensable role of modern mobile technology during times of crisis.

Read more on Forbes.