The Irish contingent in and around the city of Gdansk is adamant the Republic will pull off a result against World and European champions Spain tonight.
The second group stage is a virtual must win after the dismal opening against Croatia last Sunday.
But the 30,000-strong green army refuses to lie down and fans feel tonight is the night when Giovanni Trapattoni's men turn things around.
Gavin McCloskey, 33, from Londonderry, said: "Good luck to Spain, they're playing the best team in the world."
The Irish supporters are less concentrated along the Baltic coast than they were in the old market square in Poznan.
Thousands have divided up the destinations with options stretching up to 31 miles along the Gdynia-Sopot-Gdansk metropolis.
Stephen McKenna, 34, from Co Londonderry, said he expects the match has the makings of a game that will be remembered for a long time.
"The fans know there will be a moment in this tournament that will go down in history," he said.
"If the players can rise to the unbelievable support here, this is the moment."
Mr McKenna added: "I doubt (James) McClean will get a game unless he comes on against Italy if the game is a dead rubber. I hope I'm wrong but the first game didn't inspire."
Sitting across a table full of half drunk pints, Mark Watson, 25, from Ardoyne in north Belfast, backed his friend's optimistic assessment.
"Every tournament we have been in, we have one massive game. This will be that game," he said.
Gerard Armstrong, 31, from Belfast said: "Park the bus and tell my folks to wire over 500 euro."
Last night Northern Ireland band Snow Patrol played to about 2,000 fans in Gdansk shipyard, mostly jersey-wearing members of the green army.
Lead singer Gary Lightbody has defended his support for the Republic while also being a card carrying member of the green and white army of NI fans.