Final Score: Puerto Rico 4, Italy 3.
World Baseball Conflict of the Game: Corsican Immigration to Puerto Rico.
In the early 19th century, Spain grew fearful of a rebellion in their remaining Caribbean colonies, which included Puerto Rico. In the early 21st century, the WBC organizers grew fearful of a rebellion against the WBC. Both governing bodies decided that a jolt was needed to reinvigorate that which could soon slip away from them. The answer in each event was to invite a bunch of Europeans to come on and join the party, which in both cases (the only two times in history) did not lead to a weird discotheque-themed orgy.
Through the Royal Decree of Graces, Spain invited non-Spanish European Catholics to emigrate to Puerto Rico, while through e-mail or something more modern, WBC organizers invited the UK, France, etc. to join their quadrennial event.