I believe so.
Although given his character traits it's possible he was never in Vietnam and held onto the lie as a way to get attention or to justify his anger at elements of society. I've seen the movie many times though, and I don't think there's anything in there that would support the theory beyond a doubt.
The Big Lebowski was released in 1998.
The Production Budget for The Big Lebowski was $15,000,000.
The Big Lebowski grossed $17,498,804 in the domestic market.
The Big Lebowski... he had "Bunny Lebowski" and a "Nihilist" floating in his pool.
Maude Lebowski (Julianne Moore) in Big Lebowski
The Big Lebowski was released in 1998.
The duration of The Big Lebowski is 1.98 hours.
The Production Budget for The Big Lebowski was $15,000,000.
The Big Lebowski was created on 1998-02-24.
Julianne Moore plays Maude Lebowski.
The Big Lebowski
The Big Lebowski grossed $46,189,568 worldwide.
The Big Lebowski grossed $17,498,804 in the domestic market.
Aviator Style sunglasses with a yellow lens, used by pilots and for hunting/shooting
The cast of The Big Lebowski 2 - 2011 includes: James Adomian as The Stranger
Otomix...I have a pair for my Lebowski costume.
Which pair there were several...