Arthur still underestimated the execution capability of the Americans in dire straits.
Originally, not finding the United States Pacific Fleet in Hawaii, Arthur thought the Pacific Squadron must be stationed along the West Coast of the United States, hiding in some harbor and waiting to pounce on Australasia.
But to Arthur's surprise, even as the Australasian Army drew closer to the West Coast, there was still no sign of any United States fleet.
This was abnormal by any standard. After all, even if the main strength of the United States navy was in retreat, wouldn't they at least send out some scouting detachments?
Without knowledge of the enemy's location, war became a blind struggle and would naturally lead to an inherent disadvantage.
Believing the American army would also understand this, the absence of the United States Navy could only prove that either it was planning something big or it was truly no longer on the West Coast.