The Masters of Evil invade Avengers Mansion. Hold onto your hats, folks, this is gonna be good.

Under Siege wasn’t a crossover as such, but as an Avengers storyline, it had a number of other issues that tied in to it. It fits into the larger timeline here.

Prologues:
Avengers #264 [1] Avengers Epic Collection, vol.16: Under Siege
Avengers #270 Avengers Epic Collection, vol.16: Under Siege
Avengers #271 Avengers Epic Collection, vol.16: Under Siege
Alpha Flight #39 [2] Avengers Epic Collection, vol.16: Under Siege
Avengers #272 [2] Avengers Epic Collection, vol.16: Under Siege
Captain America #324 [3] Captain America Epic Collection, vol.16: Justice is Served
West Coast Avengers #16 [4] Avengers Epic Collection, vol.16: Under Siege
Under Siege:
Avengers #273 Avengers Epic Collection, vol.16: Under Siege
Avengers #274 Avengers Epic Collection, vol.16: Under Siege
Amazing Spider-Man #283 [5] not reprinted
Avengers #275 Avengers Epic Collection, vol.16: Under Siege
Avengers #276 Avengers Epic Collection, vol.16: Under Siege
Avengers #277 Avengers Epic Collection, vol.16: Under Siege
Epilogues:
Avengers #278 [6] Avengers Epic Collection, vol.17: Judgment Day
Avengers #279 [6] Avengers Epic Collection, vol.17: Judgment Day
Avengers #280 [7] Avengers Epic Collection, vol.17: Judgment Day
Avengers #281 [8] Avengers Epic Collection, vol.17: Judgment Day
Avengers #282 [8] Avengers Epic Collection, vol.17: Judgment Day
Avengers #283 [8] Avengers Epic Collection, vol.17: Judgment Day
Avengers #284 [8] Avengers Epic Collection, vol.17: Judgment Day
Avengers #285 [8] Avengers Epic Collection, vol.17: Judgment Day

Footnotes:

  1. Introduces the new Yellowjacket, who will play an important role in the story.
  2. This two-part Alpha Flight crossover has no real connection to the main story, but is placed here for the flow of issues.
  3. Specified to take place prior to West Coast Avengers #16 in that issue.
  4. Tiger Shark’s appearance in this story can only fit here.
  5. Specified to take place prior to Avengers #275 in that issue.
  6. Deals with the immediate fallout of the story.
  7. An epilogue focusing on that greatest of all Avengers, Edwin Jarvis
  8. A multi-part story dealing with the fallout from Hercules’ injuries.