Original sentence: Dover Patrol was a Royal Navy command of the First World War, notable for its involvement in the Zeebrugge Raid on 22 April 1918.Its primary task was to prevent enemy German shipping - chiefly submarines - from accessing the English Channel en route to the Atlantic Ocean, thereby obliging the German Navy to travel via the much longer route via Scotland.With these resources it performed several duties simultaneously in the Southern North Sea and the Dover Straits: carrying out anti-submarine patrols; escorting merchantmen, hospital and troop ships; laying sea-mines and even constructing mine barrages; sweeping up German mines; bombarding German military positions on the Belgian coast; and sinking U-boats
Edited sentence: Dover Patrol was a very important Royal Navy command of the First World War.Its primary task was simple: to prevent enemy German shipping - chiefly submarines - from accessing the English Channel en route to the Atlantic Ocean, thereby obliging the German Navy to travel via the much longer route via Scotland.The Dover Patrol's finest hour came from the Zeebrugge Raid on 22 April 1918.With these resources it performed several duties simultaneously in the Southern North Sea and the Dover Straits: carrying out anti-submarine patrols; escorting merchantmen, hospital and troop ships; laying sea-mines and even constructing mine barrages; sweeping up German mines; bombarding German military positions on the Belgian coast; and sinking the ever present U-boats