FC Twente cruised through the first round of Europa League qualifying with a 9-0 aggregate win over UE Santa Coloma.
Twente had run up a 6-0 lead from the first leg against the Andorrans and first-half goals from Willem Janssen (penalty), Peter Wisgerhof and Glynor Plet ensured Steve McClaren's eased into the second round, where they will face Inter Turku.
Rosenborg thrashed Northern Irish side Crusaders 4-0 on aggregate.
Having won the first leg 3-0 away, the Norwegians had the chance to extend their lead when awarded a penalty early in the second half, but Daniel Holm was unable to convert. Peter Ankersen, though, ultimately ensured they claimed victory in both legs when he clinched a 1-0 win in the 81st minute. They play Ordabasy Shymkent in the next round.
St Patrick's Athletic progressed on away goals after their tie at IBV Vestmannaeyjar went to extra-time.
The Irish side had led 1-0 from the first leg, but former Crewe player Matt Garner netted for the Icelanders in the 83rd minute to leave the match level on aggregate.
IBV took the lead in the 98th minute through substitute Eythór Helgi Birgisson, but Stephen O'Flynn scored for the visitors only a minute later to give his side the advantage on away goals.
St Pat's were the only side from the British Isles to progress, and their Dublin rivals Bohemians were embarrassed by a 5-1 thumping at Icelandic second division side Thor despite David Scully giving the visitors a 23rd-minute lead in their second-leg tie.
Aaron Callaghan's men had been left frustrated by a goalless draw in the first leg at Dalymount Park last week but still travelled with hope on the back of just one defeat in seven.
But after Scully's opener Bohemians collapsed with Sigurdur Kristjansson and Orri Hjaltalin giving Thor a half-time lead before Kevin Feely's own goal made it 3-1 and Kristjansson completed his hat-trick late on.
Belfast side Cliftonville were brought back to reality with a jolt as they suffered a 4-0 defeat to Allsvenskan side Kalmar in Sweden to go out 4-1 on aggregate.
Tommy Breslin's men were celebrating their first ever European victory at Solitude last week after Liam Boyce grabbed the only goal of the game, but Kalmar proved too strong at home.
Erik Israelsson opened the scoring in the 10th minute and Nenad Djordjevic and Abiola Dauda made it 3-0 before half-time. Goalkeeper Etrit Berisha added insult to injury by firing home an injury-time penalty.
Bangor City's hopes of springing a surprise against Zimbru in Moldova were ended by an early brace from home striker Oleg Molla.
Bangor had battled out a goalless draw in the first leg but Molla scored in the 29th and 32nd minutes to put his side well in control.
Mark Smyth reduced the deficit for the Welsh side one minute before the interval, but Bangor could not grab the second goal that would have taken them through on away goals.
League of Wales club Llanelli put up a good fight against Finnish top-flight side KuPS and they were unlucky not to overturn a 2-1 first-leg deficit.
Luke Bowen's 50th-minute penalty gave the Welshmen hope of going through on the away goals rule, but Aleksi Paananen equalised 10 minutes later and the Finns held out to edge through 3-2 on aggregate.
Cefn Druids were outclassed by another Finnish side, MyPa, who eased to a 5-0 win in Finland after the first leg ended in a goalless draw in Wales last week.
Druids, the first ever Welsh second-tier club to play in Europe, were under pressure from the start and Shutsa Nongotamba opened the scoring in the 25th minute. Further goals from Ville Saxman, Olajide Williams, Riley O'Neill and David Opoku gave the hosts the simplest of victories.