SPOILER ALERT
August 7th, 2010
A man and his two daughters, Mandy and Alyssa, searching for shelter in the early days of the apocalypse, come across a red-handled machete in a department store and take it with them.
Some time later
During a supply run, Alyssa is attacked and killed by a walker. Her father buries her in the backyard.
As time passes, Mandy becomes increasingly skilled at handling the weapon, so her father carves her name into the machete’s handle.
Some time later, the man is bitten by a walker. Mandy buries him next to her sister.
When intruders break into Mandy’s home, she hides and manages to escape their attention, but one of the men takes the machete.
Later, the man wraps the machete’s handle with red electrical tape, covering Mandy’s name, but while distracted he is attacked by a walker, who ends up impaled on the machete as the man tries to defend himself.
Months later
The dead woman wanders for months with the machete stuck in her chest, slowly decomposing, until she crosses paths with Joe, leader of the Claimers (TWD 9). He finally puts her down and claims the machete.
December 27th, 2011
Rick kills Joe by biting his throat and takes possession of the machete.
December 29th, 2011
After escaping Terminus, Rick kills Gareth with the machete.
January 24th, 2012
Rick and his group arrive at Alexandria, where the machete is confiscated by Negan and placed in the Sanctuary’s armory.
Some time later
One of Negan’s men escapes the Sanctuary with the machete but is later killed. The weapon remains stuck in the ground, abandoned to fate.
Much later
Mandy eventually stumbles upon the machete again and tears off the tape that had hidden her name on the handle. She returns to her childhood home, now abandoned, and plants the machete on the grave of her father and sister before walking away forever.
P.S.: The dates in the timeline are approximate, but everything happened more or less around those days.