Complex sentence: Barquq had taken part in the "mamluk" revolt against al-Ashraf Sha'ban, and was formally appointed to the powerful post of "atabeg al-asakir" (commander in chief) by al-Mansur Ali in 1378.
Split into simpler sentences: Barquq had taken part in the "mamluk" revolt against al-Ashraf Sha'ban. He was formally appointed the powerful post of "atabeg al-asakir" (commander in chief) by al-Mansur Ali in 1378.