Syria’s war: Everything you need to know about how we got here

CNN  — 

It began with the arrests of a handful of children in 2011. Since then, it’s exploded into the biggest humanitarian crisis since the Second World War.

Syria’s civil war has left more than 300,000 people dead and forced 11.2 million – nearly half the population – out of their homes. How did it come to this? Explore the events that have shaped the crisis since 2011.

It all starts with graffiti