It goes back much further than that (80s) - but that is now the cherry on the cake.
right back to the English Civil War - Liverpool was 'sacked' by the Royalists - and didnt get it back until after the Battle of Marston Moor (the royalists were led by the Marquis of Newcastle - Sunderland by the way, was a Parliamentary town - its one of the foundations for why geordies and mackems still dislike each other) - when the North was abandoned by the Royalists and focussed on the South such was their defeat at Marston.
the 1911 transport strike saw Churchil send gun boats up the mersey, and 2 strikers were shot dead by british soldiers (liverpools bloody sunday) - this histroy is passed from generation to generation.
just like we talk about being in Yorkshire, the battle of stamford bridge, eston miners, shipbuilding, 1st railways, wilf mannion, thatcher calling us Moaning Minnies etc etc etc - only The Borough goes back not too far 1800-1820 - liverpool to the 12th century - 600,000 living there, by the time Middlesbrough was born..
as Liverpudlians and evertonians sing "If you know your history...."