Complex sentence: The 4th Armoured Brigade had advanced to Azziziya, where the garrison of surrendered and light patrols of the 7th Hussars pushed forward to cut the road from Sidi Barrani to Buq Buq, while armoured cars of the 11th Hussars ranged further west.
Split into simpler sentences: The 4th Armoured Brigade had advanced to Azziziya, where the garrison of surrendered. Light patrols of the 7th Hussars pushed forward to cut the road from Sidi Barrani to Buq Buq, while armoured cars of the 11th Hussars ranged further west.