Havant ended a 19-month wait for a South Clubs’ Women’s League victory when they beat Oxford 2-1 at Barncroft Way on Saturday.
After falling behind to the visitors, Nicola Atkins levelled the scores from close range before half-time.
Georgie Poole then fired home the winner from a penalty corner in the second period.
Havant had not tasted league success since they recorded a 3-1 home win over Teddington in March 2015.
Bringing a halt to that barren run lifted them to seventh in division two.
And the boost in confidence helped them edge to a 1-0 victory over West Hampstead in round one of the National Trophy 24 hours later.
Cat Evans scored the only goal of a tight encounter when she turned in a cross from Laura Howe early in the second half.
Havant return to league action with a trip to Banbury on Saturday.