It is fair to say that the 2019/20 season will go down as one to remember.
Due to the Coronavirus pandemic - which swept across the world - the campaign experienced an unprecedented shutdown between mid-March and mid-June, with the final matches of the season played behind-closed-doors, in empty stadiums.
Taking pre-season into account, 2019/20 lasted over one calendar year. If you cannot remember back to where it all began, stick with millwallfc.co.uk as we embark on Part One of our Season Review...
After a thrilling draw with Real Sociedad finished off The Lions' friendly fixtures seven days before, the campaign opened up with the visit of Preston North End - and Millwall were to gain three first-day points, as Jed Wallace's strike was enough to win the game.
Back-to-back visits to West Bromwich Albion were to follow, as firstly Matt Smith - with his first goal for the club - stepped off the bench to level the League fixture and secure The Lions a point, which was the least they deserved, before wholesale changes for both sides allowed Millwall to win a Carabao Cup tie 2-1, courtesy of goals from Tom Bradshaw and Aiden O'Brien.
It looked to be an uphill battle for The Lions when Jed Wallace was shown a straight red card during the first-half of a Den date with Sheffield Wednesday, but Smith's header was enough to bag a gritty victory, but a night to forget followed at Craven Cottage as Fulham ran out 4-0 winners.
Bradshaw found the net to salvage a point at Middlesbrough on an afternoon which should've seen The Lions take all three points back down south at the Riverside Stadium, before a crazy Carabao Cup Second Round tie saw Neil Harris' side snatch a defeat from the jaws of victory against Oxford United to exit the competition on penalties.
Jed Wallace kept up his early-season scoring record with a successful spot-kick in a 1-1 draw at home to Hull City to end August, but a drab defeat at Ewood Park against Blackburn Rovers and a home reverse to London neighbours Queens Park Rangers sent The Lions tumbling down the Sky Bet Championship table.
Two away draws - at Huddersfield Town and Luton Town - capped off September and began October, but after the Kenilworth Road trip, news broke of Neil Harris' resignation from his position as Millwall manager.
After nearly 20 years of affiliation with the club, two Play-Off Finals as the boss and one promotion, The Lions now had to end one era and begin another - beginning with the visit of high-flying Leeds United.
Take a look at all the goals from Part One of our Season Review below...