Syrian opposition fighters have pushed back government forces around Aleppo in a surprise offensive, rapidly expanded the territory under their control in northwestern Syria. On Wednesday, they battled pro-government forces on the outskirts of Hama.

An offensive by opposition forces in Syria is redrawing the map of areas controlled by the rebels, despite Russian-backed airstrikes by President Bashar al-Assad and his government forces on the north of the country.

It’s been one week since rebel forces launched their largest offensive against the Syrian government in years. BBC Verify has been tracking their advances.