Complex sentence: On 22 November, the North African Agreement placed Vichy French North Africa on the Allied side and Allied garrison troops were released for the front; the Axis had been reinforced to a corps and outnumbered the Allies.
Split into simpler sentences: On 22 November, the North African Agreement placed Vichy French North Africa on the Allied side and Allied garrison troops were released for the front. By this time, the Axis had been reinforced to a corps and outnumbered the Allies.