Complex sentence: To complete its destruction, a second attack was scheduled for the 13 of May when 14 Phantoms were engaged, with LGBs of up to aimed at the central pillar supporting the bridge.
Split into simpler sentences: To complete its destruction, a second attack was scheduled for the 13 of May. This time 14 Phantoms were engaged, with LGBs of up to aimed at the central pillar supporting the bridge.