The Walking Dead: 10 Worst Things Alpha Ever Did
4. Destroying Hilltop
By the midpoint of season ten, the Whisperer War is in full swing, with the communities forced to rally what little forces they have against Alpha's impenetrable horde and loyal followers.
The war's greatest conflict, at least until Beta's final attack in the original season finale, comes two-thirds into the season, when Alpha leads her people to Hilltop and viciously burns it to the ground whilst bombarding her opponents with waves of the undead.
The destruction of Hilltop leaves its people scattered and beaten, symbolising the end of an era for the show and causing the battle's survivors to be spread thin across whatever settlements still remain.
With the battle's repercussions still being felt as of this writing, and Hilltop itself now being completely uninhabitable, it's safe to say this attack was Alpha's most successful and deadly.