- “Spag Union, turning irresponsible little boys into men since 1925.”
- ―Commercial Narration
Spag Union Military Academy (also known as Spag Union Preparatory School in the Dog Days film) is an all-boys military school that Greg's dad tried to enroll him into if he did not behave well. Boys could attend Spag Union once they reached the middle school age. Greg did not go to Spag Union because, during Seth Snella's half-birthday party, Greg saved his dad from having to try to make Seth laugh by doing funny stuff by trying to get Seth's blue blanket back, ending up hanging on the tree and his pants falling down in the process. That accident prevented his dad from having to act in front of Seth, and his dad paid him back by reverting his decision on sending him to Spag Union. It is briefly seen in The Last Straw and mentioned in Dog Days.
In the movie, Greg and Rowley first passes Spag Union on the way to the country club. Rodrick finds a Spag Union DVD package in the mail a day after the work lie backfired. While
he and Greg are watching it, it makes them worried they would end up there. The film also shows a student who used to play video games every day, but when he got sent there he started reading math books saying that he found more adventure in the book. Another student used to lie that he would be studying, but he would hang out with his friends at the mall. He now has a tracking device so he can't sneak out. After the tape, Rodrick tells Greg that he should use Wilderness Weekend to prove to his father that he won't need to go to Spag Union. Fortunately Frank has decided not to send Greg to Spag Union, after learning the truth that his neighbor Mr. Warren made fun of him and after he accused Greg of burning his tent and that Greg took responsibility for the incident.
Spag Union is mentioned in the online version as well. A similar school called Bishop Garrigan High School is mentioned as well.
- Spag Union was established in 1925.
- According to Fregley, you have to call everyone there in authority "sir," even the ladies.