Crossover: Phalanx Covenant: Life Signs
Published in: X-Factor (1st series), X-Force, Excalibur, September-October 1994
Writers: Scott Lobdell/Todd DeZago (Parts 1, 3), Fabian Nicieza (Part 2)
Pencilers: Jan Duursema/Roger Cruz (Part 1), Tony Daniel (Part 2), Ken Lashley/Steve Epting (Part 3)
Major Characters Involved: Professor X, X-Factor II, X-Force I, Excalibur, Shinar, Phalanx
Plot: The combined teams of X-Factor, X-Force and Excalibur seeks a way to defeat the Phalanx before they can call for more of their kind in outer space.
Reading Order:
Part 1 - X-Factor (1st series) #106
Part 2 - X-Force #38
Part 3 - Excalibur #82
Related Issues:
- Excalibur #78-80 - "The Douglock Chronicles" in which Excalibur encounters the outcast Phalanx known as Douglock.
- Uncanny X-Men #316-317, X-Men (2nd series) #36-37 - The Phalanx Covenant storyline begins in the Phalanx Covenant: Generation Next crossover.
- Wolverine (2nd series) #85, Cable #16 - The Phalanx Covenant storyline concludes in the Phalanx Covenant: Final Sanction crossover.
Notes:

- All issues of the Phalanx Covenant: Life Signs crossover had wraparound covers with a foil strip resembling circuitry.
- Excalibur's home on Muir Island was overrun by the Phalanx in X-Factor (1st series) #106.
- To hide from the Phalanx, Excalibur, X-Factor and X-Force resided at the fortress once used by the Acolytes, which was first seen in Uncanny X-Men #300.
- Shinar made his debut in X-Factor (1st series) #106.
- In X-Factor (1st series) #106, Steven Lang starts questioning the motives of the Phalanx, which leads him to betray them in the Phalanx Covenant: Final Sanction crossover.
- In X-Factor (1st series) #106 and X-Force #38, Douglock takes Wolfsbane, Forge and Cannonball to the Phalanx's communications tower known as the Babel Spire.
- In X-Force #38, Moira MacTaggert puts Shadowcat and Rictor through the same memory-extraction chamber she once had to endure in Uncanny X-Men #300.
- In Excalibur #82, Douglock pretends to betray his new allies to the Phalanx, but Shinar exposes his deception.
- Shinar forces Forge to provide a new energy source for a group of pods containing unborn Phalanx in Excalibur #82. Instead Forge sets an energy fluctuation through the pods, causing them to explode.
- Douglock destroyed the Babel Spire in Excalibur #82 by jamming its energy transmission, which also destroyed most of the Phalanx present including Shinar.