Maverick’s origin is told in MAV2 2-FB, which leads up to the Omega Red flashbacks in X-Men #5-7. We’re missing John Wraith’s appearance in these flashbacks. Also, Maverick’s nemesis the Confessor should probably get a listing, as well as Maverick’s brother and wife.
There’s another flashback that leads into MAV2 1.
CONFESSOR/
MAV2 2-FB
MAVERICK/CHRISTOPHER NORD/"DAVID NORTH"
*MAV2 2 (1-3)-FB
*MAV2 2 (12-15)-FB
*MAV2 2 (16:2-16:3)-FB
W2 87-FB
*MAV2 2 (16:4-17)-FB
{X 5 (10:1 - 10:3)-FB}
…
MAV
*MAV2 2 (18:2-18:3)-FB
MAV2 1
…
NORD, ANDREAS
MAV2 2-FB
NORD, GINETTA LUCIA BARSALINI
MAV2 2-FB
WRAITH, JOHN
*MAV2 2-FB
W2 61 (12:4 - 14:6)-FB
…