A ceremony in northern Iraq on Friday saw a handful of Kurdistan Workers’ Party (PKK) militants lay down their weapons, a small but hugely symbolic gesture that marks the beginning of an end to a conflict with the Turkish state that’s lasted nearly five decades and cost tens of thousands of lives.

The disarmament process will start under tight security in Iraqi Kurdistan and is expected to take all summer.

Fighters with a Kurdish separatist militant group that has waged a decades-long insurgency in Turkey have begun laying down their weapons in a symbolic ceremony Friday in northern Iraq, the first concrete step toward a promised disarmament as part of a peace process.