A former U.S. Navy commander has pleaded guilty to bribery and conspiracy in the latest fallout from a corruption case that spanned a decade and involved dozens of Navy officials.

Prosecutors say Troy Amundson pleaded guilty to a charge of a charge of conspiracy to commit bribery on Tuesday in San Diego federal court. The Ramsey, Minnesota native could face up to five years in prison and a $250,000 fine.

The 50-year-old was responsible for coordinating the Navy's joint military exercises with foreign counterparts.

Former Navy commander Troy Amundson, 50 (right), pleaded guilty on Tuesday to a charge of conspiracy to commit bribery in San Diego federal court

He acknowledged that from 2005 to 2013, he accepted bribes in the form of prostitutes, meals and entertainment expenses in exchange for helping a Malaysian businessman and military contractor nicknamed "Fat Leonard" Francis.

Amundson admitted to giving secret military information to contractor 'Fat Leonard' Francis (pictured) in exchange for meals, entertainment and prostitutes

Authorities say Francis bribed officials to help his Singapore-based company, Glenn Defense Marine Asia, overbill the Navy for fuel, food and other services his company provided to ships docked in Asian ports.

In one email, Amundson arranged to hand-off confidential information to Francis.

He wrote: 'Your program is awesome. I am a small dog just trying to get a bone… however I am very happy with my small program. I still need five minutes to pass some data when we can meet up. Cannot print.'

Prosecutors say later that night, Francis arranged for Amundson to meet with several prostitutes from Mongolia.

Amundson also admitted to deleting his personal emails with Francis on the same day in 2013 that he was interviewed by federal investigators.

'Amundson deliberately, methodically, and repeatedly traded his public office for entertainment expenses and the services of prostitutes, and in so doing, aligned himself with a foreign defense contractor over his Navy, his colleagues and his country,' U.S. Attorney Adam Braverman said in a statement on Tuesday. 'We are pressing forward in this investigation until we are certain that all involved have been held accountable.'

Twenty people have pleaded guilty so far in the biggest corruption scandal in modern Navy history. Nine others are fighting the charges.

Others involved in the scandal passed information to Francis in exchange for cash, Cuban cigars, Kobe beef, Spanish suckling pigs, and luxury travel.

It's estimated that Francis and his connections defrauded the Navy out of at least $35million over a decade.

Amundson is set to be sentenced on April 27.

Francis pleaded guilty in 2015 to bribery and fraud charges and is currently awaiting sentencing.