Both sides in the fight over the Oakland A’s waterfront ballpark are expected to turn out in force Monday for the first round in the approval process for the team’s planned 35,000-seat stadium, housing, retail and entertainment development at the Port of Oakland.

“We’re not just going to a meeting, you are going to see a full-blown rally, Oakland A’s President Dave Kaval said of the port’s Board of Commissioners meeting.

“It’s important to show that the public and the A’s and the port commission are all on the same page and ready to go forward,” Kaval said.

At issue is a tentative agreement to give the A’s four years to complete an environmental impact report on the project, plus get the needed land-use approvals from state and local agencies to develop the 50-acre site.