"We've been bullied too long. We weren't going to let that happen again."
Watmough's comments were backed up by hooker Robbie Farah who said Gallen's actions reinforced the feeling among the squad.
"Our skipper led by example and it got a bit heated out there," Farah said.
"But we stand together as a team. We're a solid group here and have come together real well over the last 10 days."
Watmough saluted the Blues debutants who played a part in a first series opener win since 2008.
Blake Ferguson, Andrew Fifita and James Maloney enjoyed strong debuts although Josh Reynolds became the first NSW player to not come off the bench since Ken McGuinness in 1998.
"It's tough for Josh, but he's very much part of this team," Watmough said.
"I am sure he will get a run in game two.
"The other guys were outstanding. Jimmy Maloney was great running the ball and Fifita was just amazing the way he got up the middle.
"It's going [to be] a big ask up there to win in game two and we're going to have to play even better to win."
- AAP