Max Kemether passed for 183 yards and a touchdown for the Wolfpack (2-3, 1-1 Region 5A), which held Landmark to its second-lowest point total of the season.
"Congratulations to Landmark they've got a lot of good football players," Whitefield Academy coach Jimmy Fields said. "Obviously, they were the better football team tonight, so hats off to them."
Cantrell Frazier and Jeremiah Kirkland scored two touchdowns apiece for Landmark, which improved to 5-0 overall and 2-0 in Region 5A.
"I give (Whitefield Academy) great credit," Landmark Christian coach Kenny Dallas said. "They have a good line of scrimmage and they fought very hard. I'm very proud of our kids for fighting in one of these ugly types of games and winning it."
In the War Eagles' three previous games, they posted totals of 69, 65 and 49, but Lorenzo Carter, James Shultz and Max Rieves, who all had at least six tackles apiece, helped limit them to just 13 points in the first half.
"I think the scheme was 11 guys playing defense with big hearts," Fields said. "Our defensive coaches did a great job all week preparing. The kids came out and executed and got after it. We bent a little bit but didn't break."
After falling into a 13-0 hole in the second quarter, the Wolfpack made the War Eagles pay for 30 yards worth of penalties when Kemether scrambled to keep the play alive and found Rieves in the end zone for a four-yard score with 5:31 left in the frame.
Following a 42-yard catch by Leland Manning and a 19-yard grab by Jay Fields on its next drive, Whitefield moved to within three points when Thomas East nailed a 33-yard field goal with 31 seconds to go before halftime.
However, none of that momentum spilled over into the second half since Whitefield's first three possessions ended in punts while Landmark's first three drives ended with two touchdown runs by Kirkland and one by Frazier.
"It was tight at halftime and we distanced ourselves when we were supposed to," Dallas said. "Great teams play great in the second half. ...We want to be a good first half team but a great second half team."
"We bent a little more than we would have liked to in the second half," Fields said. "But I'm proud of our kids ... they showed a lot of character."