Plans to Invade Ulthuan

After Arahamin Mizzrym took control of the Eladrin, she started planning to take Ulthuan. Knowing its defenses, she had to find a way to get her troops on the island without being killed by the Sentinals. She eventually got a message from Emperor Morbo asking if the Eladrin could provide him with a weapon to fight magic. She responded that the only way she would even concider it is if he could provide her with a way to get her troops safely deployed on Ulthuan. It took a few months, but eventually Morbo got back to her with a fleet of Submarines.
They started sneaking in large groups of drow with submarines coming through the Inner Sea not surfacing, but instead burrowing a tunnel under sea level with a swan neck they where able to burrow all the way under the city. Combined with a couple of large scale attacks that where ment as a distraction, they where able to get almost a 10.000 soldiers hiding in the city itself and another 85.000 soldiers in the tunnels under the city.