Admiral Art McDonald, has stepped down ahead of an investigation into unspecified allegations.
Defence Minister Harjit Sajjan made the bombshell announcement late last night.
He said McDonald left the post voluntarily, and the Canadian Forces National Investigation Service had been tasked to look into the matter.
Lieutenant General Wayne Eyre is taking over the role of acting chief of the defence staff.
Grimsby, Port Colborne Honour Remembrance Day
Services also held in Niagara Falls, St. Catharines
St. Catharines Man Charged with Drug Dealing
Police say they've been investigating an individual over the last few months
Wainfleet Man Wins Lottery... 1st Time
He says his wife didn't believe him, she then rolled over and fell back asleep
MP Plans to Hear More Vaccine Injury Stories
Dean Allison, of Niagara West, says many people didn't get to speak in September
Cash Registers Stolen in Thorold B&Es
Motel Fire Considered Suspicious
Fire fighters were called last week to a motel in Niagara Falls
Frank Campion Named Niagara Regional Chair
Niagara Businesses Discuss Tariffs at Event
Canada's new consul general in New York gave presentation