Rather, it is speculated that alien reinforcements must be coming to Earth soon, so their new plan is to just focus on defending their "beachheads" in the massive command towers they have deployed in major cities.
Tom confronts him about this and questions him his mental state, his ability to lead the fighters and help the civilians, and his orders to continue the attack in the face of heavy odds.
Weaver admits to the assembled group that they have received no contact from the 4th and 5th Mass militias, making it look increasingly probable that Colonel Porter is dead.
Even if the assault is suicidal, they have to try, and their sacrifice will inspire other resistance fighters and their children to keep fighting the aliens, no matter how long it takes.
Weaver apologizes for hiding the full extent of the bad news from the 2nd Mass, then asks for 50 volunteer fighters, who now know what they are facing.
Their plan is to fight their way to the support-pillars of the alien command tower in central Boston, then use Pope's home-made demolition charges to take it out.