Hundreds of thousands of people in search of safety and better opportunity have risked their lives in the past year to reach Europe from war-torn and poverty-stricken countries.

Europe is struggling to come up with a response for the thousands at their doors. On Monday, European Union member states agreed, "in principle," to resettle 160,000 refugees, but failed to reach a consensus on which countries would take them in.

The current crisis didn't come out of nowhere. Take a look at some of the major events of the past year to see how the situation's evolved.