The Suspicious Enemy Base
Arthur didn't have to wait for so long. As he expected, there was a big group of enemies hidden under a grand concealing array at the north.
'We found them' Gege said before adding, 'over three million! I dunno how they moved them without getting noticed.'
"They must have used summoning gates," Arthur thought for a second, "how about the fight here?"
'We secured three islands and destroyed the rest,' Gege said, 'but there are many still coming this way.'
Before this all started, the dark angel mage ordered nearly all the islands to converge and gather around the main base. He never thought he would lose this badly to Arthur. But that wasn't the issue here.
These islands got the order to advance, but didn't get any other order after the destruction of the main base. So they were heading this way without stopping.