Complex sentence: The rapid fire of the weapons led to air support being summoned, with a Stuka squadron bombing the cupola; although the bombs did not destroy the cupola, the explosions did force the Belgians to retract it throughout the rest of the fighting.
Split into simpler sentences: The rapid fire of the weapons led to air support being summoned, and a Stuka squadron bombed the cupola. Although the bombs did not destroy the cupola, the explosions did force the Belgians to retract it throughout the rest of the fighting.