Complex sentence: It was during this time that the "Lufbery circle" maneuver became named for him, although most aviation scholars agree that Lufbery did not actually invent it, just popularized it among Allied flyers.
Split into simpler sentences: It was during this time that the "Lufbery circle" maneuver became named for him. Although most aviation scholars agree that Lufbery did not actually invent the maneuver, it was popularized among Allied flyers.