O is for "Oh! What a Lovely War"

 My choice for the O movie that best exemplifies the war genre is "Oh! What a Lovely War". I chose it because it shows that the genre even includes musicals. And war movies can be used to bring audiences back to the past by introducing them to (or reminding them of) music from an earlier era. The film is packed with WWI-era songs. And before you say that a musical can not truly show the reality of war, this movie is one of the best anti-war movies ever made.  

 

Objective, Burma  (Oct, 2013)

Odd, Angry Shot, The (1979)  (Au., 2022)
Oh! What a Lovely War  (Aug, 2011)

One Minute To Zero (1952)   (July, 2022)

One Shot  (Apr, 2023)

On the Double vs. Imitation General  (Feb, 2014)

The One That Got Away   (Oct., 2020)

The One That Got Away vs. Bravo Two Zero  (Dec., 2021)

Only "Old Men" Are Going to Battle (July, 2023)

On the Beach (1959)  (Aug., 2022)

Operation Christmas Drop   (Dec., 2021)
Operation Crossbow  (Oct., 2014)

Operation Dumbo Drop  (Jan., 2022)
Operation Finale  (Feb, 2019)

Operation Mincemeat  (May, 2022)
Operation Pacific  (Oct, 2013)
Operation Petticoat vs. Down Periscope  (July, 2017)
Operation Red Sea  (Apr, 2019)

Oppenheimer (July, 2023)
Outlaw King  (Nov, 2018)
The Outpost  (July, 2020)  and here  (June, 2021)

Outside the Wire  (Jan, 2021)
Overlord (1975)  (June, 2013)
Overlord (2018) (Nov, 2018)