The Republic of Ireland are entering their first competitive fixture since the March defeat against North Macedonia.
Heimir Hallgrimsson's team have completed four friendly internationals since that match, securing victories over Grenada and Qatar alongside draws with North Macedonia and Canada.
This Thursday's encounter with Kosovo in Pristina marks a return to competitive football for the squad.
Finishing at the top or second place in their group will secure promotion to League A or a play-off against a third-placed side from that tier.
A top-two finish also guarantees placement in Pot Two for the Euro 2028 qualifiers, with the draw scheduled for Belfast in December.
Conversely, a third-place result keeps them in League B while a bottom-four position triggers a play-off against a second-placed team from League C.
Failure to win that subsequent match would see relegation to the third tier of the Nations League structure.
Troy Parrott remains a key figure for the campaign following his successful adaptation to La Liga with Real Betis.
The 24-year-old scored on his Champions League debut against Lille and added another goal shortly after in a 3-2 away victory.
He also provided an assist against Getafe during his time at the Spanish club.
Parrott's inclusion signals confidence from management as he continues to develop seamlessly within the new league environment.
Injuries have impacted the available roster ahead of the Nations League window which features four games over a two-week period.
Jimmy Dunne, Bosun Lawal and Owen Elding are currently recovering from injuries or working towards full fitness under Hallgrimsson's guidance.
Harvey Vale from QPR and Jamie McGrath from Hibernian were unable to participate due to injuries sustained during warm-ups on Saturday.
The squad will face Kosovo, Israel twice and Austria within the compressed schedule.
BBC Sport NI is examining how both the Irish side and their opponents are preparing for these fixtures.