Like "Cry Havoc" (also made in 1943 but with a small cast and a modest set), this is a film about American Army nurses stranded on Corregidor, Philippines during the horrific time when General MacArthur was ordered to retreat to Australia. Both films are fascinating and moving because they were made during the War, before its outcome was known.
The performances of the very large cast of "So Proudly We Hail" are uniformly good -- with the exception of Ms. Goddard, whose mannerisms are annoying. George Reeves gives the performance of his career and even the much-maligned Sonny Tufts turns in a subtle performance.
The balance of violence and romance works; and commendable also is the script's restraint coupled with unexpected plot turns and un-clichéd character studies. It's long, yes, and occasionally strives to sound like a documentary, but it is never boring and one of its set-pieces, a patriotic speech made by the chaplain (Walter Abel), still resonates today, during another war.