Complex sentence: The M11/39s took part in an engagement on 5 August at Sidi Azeiz and the I and II battalions were the first units of the 32nd Armoured Regiment to cross the Egyptian border in September and reached Sidi Barrani.
Split into simpler sentences: The M11/39s took part in an engagement on 5 August at Sidi Azeiz. The I and II battalions were the first units of the 32nd Armoured Regiment to cross the Egyptian border in September and reached Sidi Barrani.