The Eagles began a lengthy assembly in build up to the 2015 Rugby World Cup with the 2015 Pacific Nations Cup. On July 18, the U.S. dropped the opening PNC match 21–16 to Samoa. The team bounced back to upset Japan 23–18. The Eagles, however, fell to Tonga in the final preliminary match for the PNC 33–19. In the resulting fifth-place match, the Eagles edged rival Canada 15–13. The victory was the second consecutive over team Canada. Three weeks later, Canada and the U.S. met again in a World Cup warmup match. For the first time, the U.S. laid claim to a three-match win streak over team Canada after defeating the Canadians 41–23. Continuing on the road to the World Cup, the U.S. faced off against English Premiership side Harlequins, where the Americans fell to the visitors 24–19. The Eagles returned to Soldier Field to compete against the #2 ranked Australia Wallabies. The Americans trailed 14–10 at the half. In the second half, the Wallabies capitalized on American errors and pushed the match out of reach: Australia 47, the U.S. 10.