In Day 3 of the Cup, Ireland was given a tall order in chasing 304 but managed the feat, winning by four wickets and conjuring memories of its victories over England in 2011 and Pakistan in 2007.
The win was the first thus far by a team batting second through five games of the tournament. The West Indies won the first two World Cups, in 1975 and 1979, and the country came in ranked eighth, while Ireland was ranked 11th.
Chasing 305 for a win, the William Porterfield-led side rode on gutsy fifties from Paul Stirling (92), Ed Joyce (84) and Niall O’Brien (79 not out) to achieve its target in 45.5 overs.
Brief Scores: West Indies 304/7 in 50 overs (Lendl Simmons 102, Darren Sammy 89; George Dockrell 3-50)
Ireland 307/6 in 45.5 overs (Paul Stirling 92, Ed Joyce 84, Niall O’Brien 79 not out; Jerome Taylor 3-71).