Ireland had scored just goals of their preceding 12 Nations League video games with out victory, but surpassed that tally in 90 minutes as Alan Browne, Troy Parrott and Michael Obafemi placed Steve Clarke's men to the sword.
Scotland had began their Nations League marketing campaign with a cushty 2-zero win over Armenia on Wednesday.
But Clarke's destiny can also now be questioned after a second humiliation in 10 days.
Scotland had been outclassed by using a Ukraine aspect offering many gamers of their first aggressive movement for months in a 3-1 World Cup playoff defeat on domestic soil on June 1st.
Ireland had no longer won a competitive domestic match for 3 years, but boss Stephen Kenny subsequently had some thing to celebrate as his facet dominated from the start.
The hosts took the lead in the 20th minute when Browne bundling the ball over the line after Shane Duffy had headed down a James McClean corner.
Ireland's 2d goal came just seven minutes later whilst Obafemi's perfectly-weighted skip into the Scotland field located Parrott who headed past onrushing goalkeeper Craig Gordon.
Things went from bad to worse for Scotland and Gordon in the 2d half of as Swansea striker Obafemi capped his first global begin with a thunderous pressure that bewildered the Hearts stopper from out of doors the box.
Ireland ought to even have had a fourth but a VAR check denied Scott Hogan as his effort turned into hooked off the road by way of Grant Hanley.
Victory takes Ireland above Scotland on purpose difference in Group B1, but each path Ukraine, who were three-zero winners over Armenia early on Saturday, through three factors.
