By the time that Brussels and Rotterdam were liberated, it had become difficult for the 21st Army Group to be supplied adequately; indeed one corps (VIII Corps) had been withdrawn from active service in order to free its transport for general use.
It had become difficult for the 21st Army Group to be supplied adequately. Brussels and Rotterdam were liberated. This was by the time this. Indeed one corps (VIII Corps) had been withdrawn from active service. This was to free its transport for general use.