Why has eastern Ukraine returned to
full-scale conflict?
Fighting started in April 2014
and raged for months until Ukraine and the separatists came to a deal on 5
September to halt the violence and free prisoners. But the ceasefire never held
entirely. Although the intensity of the conflict subsided, the clashes never
really ended and both sides used the relative lull to build up their forces.
The battle raged for the control of
the ruined airport at Donetsk, with Russian-backed rebels trying to seize a
strategic and symbolic asset.
A new rebel push began with the
start of the year, culminating in the capture of the airport's main terminal on
22 January.