Saw a great set if shows on D-Day and veterns, D-Day veterns retu4n, Dauntless,The story of Midway, and others NOW HEY ARE GONE FROM THE GUIDE!!!!! They were to repeat staring at 10pm but all are gone even the channel, i told a lot of vets about the shows and now they are gone, is ROKU cancelling shows on Vets?
Unfortunately, you may have just confused where you were watching these shows.
ch.386 on the Roku Channel Live TV is Movie Favorites by Lifetime (Mother Knows Best), so unlikely it was on that channel. (this channel will be the same for any US viewer).
If you can tell us where you were watching it, can maybe poke around a bit. Best I can find on the Roku Channel Live TV is ch. 479 Military Heroes that is showing some D-Day related shows this evening.
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Detroit channel 38 is WADL, the over the air MyTV station broadcasting on channel 38.1. I can find no indication that they deviated from their set daily schedule for any special programming on Memorial Day.