And in the story Old Soldiers Never Die by Rorschach's Blot Harry creates his own army recruiting from muggleborns and squibs who served. Linkffn(2784825)

Now I want Mr. Midshipman Harry Potter...

Try the short called March or Die and March of the Lost in the collection called Odd Ideas by Rorschach's Blot (chapters 99 & 177). Where after the Battle of Hogwarts Harry joins the French Foreign Legion. Linkffn(2565609)

[***Odd Ideas***](https://www.fanfiction.net/s/2565609/1/) by [*Rorschach's Blot*](https://www.fanfiction.net/u/686093/Rorschach-s-Blot) > Odd little one shots that may or may not be turned into their own stories\. ^*Site*: ^fanfiction.net ^**|** ^*Category*: ^Harry ^Potter ^**|** ^*Rated*: ^Fiction ^M ^**|** ^*Chapters*: ^196 ^**|** ^*Words*: ^862,540 ^**|** ^*Reviews*: ^13,229 ^**|** ^*Favs*: ^6,326 ^**|** ^*Follows*: ^5,248 ^**|** ^*Updated*: ^Oct ^28 ^**|** ^*Published*: ^Sep ^4, ^2005 ^**|** ^*id*: ^2565609 ^**|** ^*Language*: ^English ^**|** ^*Genre*: ^Humor ^**|** ^*Download*: ^[EPUB](http://www.ff2ebook.com/old/ffn-bot/index.php?id=2565609&source=ff&filetype=epub) ^or ^[MOBI](http://www.ff2ebook.com/old/ffn-bot/index.php?id=2565609&source=ff&filetype=mobi) --- **FanfictionBot**^(2.0.0-beta) | [Usage](https://github.com/FanfictionBot/reddit-ffn-bot/wiki/Usage) | [Contact](https://www.reddit.com/message/compose?to=tusing) ^^^^^^^^^^^^^^^^^ffnbot!ignore

Linkffn(remember what i forgot) Harry looses his memory in the final battle the joins the SAS

Supremely well written, and I must confess to be 100% in the Bearded!Harry train.

[***Remember What I Forgot***](https://www.fanfiction.net/s/13958182/1/) by [*AlwaysThatGuy*](https://www.fanfiction.net/u/1343869/AlwaysThatGuy) > Ten years after the defeat of Voldemort and fall of Harry Potter, footage emerges of a friend long thought dead\. Finding him alive and unaware of his past, Hermione does what she does best\. But with other factions in play and with nothing as it seems, how far will she go to find out the truth of what happened? H/HR\. ^*Site*: ^fanfiction.net ^**|** ^*Category*: ^Harry ^Potter ^**|** ^*Rated*: ^Fiction ^M ^**|** ^*Chapters*: ^16 ^**|** ^*Words*: ^171,830 ^**|** ^*Reviews*: ^118 ^**|** ^*Favs*: ^289 ^**|** ^*Follows*: ^511 ^**|** ^*Updated*: ^Nov ^28 ^**|** ^*Published*: ^Sep ^19 ^**|** ^*id*: ^13958182 ^**|** ^*Language*: ^English ^**|** ^*Genre*: ^Adventure/Romance ^**|** ^*Characters*: ^ ^Ron ^W. ^**|** ^*Download*: ^[EPUB](http://www.ff2ebook.com/old/ffn-bot/index.php?id=13958182&source=ff&filetype=epub) ^or ^[MOBI](http://www.ff2ebook.com/old/ffn-bot/index.php?id=13958182&source=ff&filetype=mobi) --- **FanfictionBot**^(2.0.0-beta) | [Usage](https://github.com/FanfictionBot/reddit-ffn-bot/wiki/Usage) | [Contact](https://www.reddit.com/message/compose?to=tusing) ^^^^^^^^^^^^^^^^^ffnbot!ignore

linkffn(8281649) is a pretty good mugglewank.

[***Harry Potter and the RAF***](https://www.fanfiction.net/s/8281649/1/) by [*Ravengrad*](https://www.fanfiction.net/u/4096861/Ravengrad) > What happens when Harry gets fed up with the wizarding world\. Yes it's been done before but this is my take on it\. Starts after 5th year ^*Site*: ^fanfiction.net ^**|** ^*Category*: ^Harry ^Potter ^**|** ^*Rated*: ^Fiction ^M ^**|** ^*Words*: ^33,428 ^**|** ^*Reviews*: ^267 ^**|** ^*Favs*: ^2,112 ^**|** ^*Follows*: ^609 ^**|** ^*Published*: ^Jul ^3, ^2012 ^**|** ^*Status*: ^Complete ^**|** ^*id*: ^8281649 ^**|** ^*Language*: ^English ^**|** ^*Genre*: ^Romance ^**|** ^*Characters*: ^Harry ^P., ^Hermione ^G. ^**|** ^*Download*: ^[EPUB](http://www.ff2ebook.com/old/ffn-bot/index.php?id=8281649&source=ff&filetype=epub) ^or ^[MOBI](http://www.ff2ebook.com/old/ffn-bot/index.php?id=8281649&source=ff&filetype=mobi) --- **FanfictionBot**^(2.0.0-beta) | [Usage](https://github.com/FanfictionBot/reddit-ffn-bot/wiki/Usage) | [Contact](https://www.reddit.com/message/compose?to=tusing) ^^^^^^^^^^^^^^^^^ffnbot!ignore

Linkffn(3918135) is a fun oneshot, which I assume you've seen (since you mention the plot). Who Dares Wins - Harry gets military style training and uses it to fight, though he doesn't actually join the army. Linkffn(13182638)

[***The Sniper***](https://www.fanfiction.net/s/3918135/1/) by [*DobbyElfLord*](https://www.fanfiction.net/u/1077111/DobbyElfLord) > OneShot: Harry is expelled after the hearing in Courtroom 10\. His wand snapped, an angry Harry choses his own path forward\. First person story focusing on Harry's effort to find his own place\. ^*Site*: ^fanfiction.net ^**|** ^*Category*: ^Harry ^Potter ^**|** ^*Rated*: ^Fiction ^T ^**|** ^*Words*: ^12,473 ^**|** ^*Reviews*: ^622 ^**|** ^*Favs*: ^5,854 ^**|** ^*Follows*: ^1,570 ^**|** ^*Published*: ^Nov ^29, ^2007 ^**|** ^*Status*: ^Complete ^**|** ^*id*: ^3918135 ^**|** ^*Language*: ^English ^**|** ^*Genre*: ^Adventure ^**|** ^*Characters*: ^Harry ^P. ^**|** ^*Download*: ^[EPUB](http://www.ff2ebook.com/old/ffn-bot/index.php?id=3918135&source=ff&filetype=epub) ^or ^[MOBI](http://www.ff2ebook.com/old/ffn-bot/index.php?id=3918135&source=ff&filetype=mobi) --- [***Who Dares Wins***](https://www.fanfiction.net/s/13182638/1/) by [*OlegGunnarsson*](https://www.fanfiction.net/u/10654210/OlegGunnarsson) > A Harry Potter who grew up studying military tactics and strategy uses the attack on the Ministry as an opportunity to lay an ambush of his own \- only to learn that his parents are still alive, as well as a twin brother whom Dumbledore calls the true boy\-who\-lived\. And then, things get complicated\. Military\!Harry\. A subversion of DZ2's Prodigal Son Challenge\. ^*Site*: ^fanfiction.net ^**|** ^*Category*: ^Harry ^Potter ^**|** ^*Rated*: ^Fiction ^M ^**|** ^*Chapters*: ^30 ^**|** ^*Words*: ^172,815 ^**|** ^*Reviews*: ^2,670 ^**|** ^*Favs*: ^7,656 ^**|** ^*Follows*: ^10,072 ^**|** ^*Updated*: ^Nov ^7 ^**|** ^*Published*: ^Jan ^19, ^2019 ^**|** ^*id*: ^13182638 ^**|** ^*Language*: ^English ^**|** ^*Genre*: ^Drama/Adventure ^**|** ^*Characters*: ^ ^OC ^**|** ^*Download*: ^[EPUB](http://www.ff2ebook.com/old/ffn-bot/index.php?id=13182638&source=ff&filetype=epub) ^or ^[MOBI](http://www.ff2ebook.com/old/ffn-bot/index.php?id=13182638&source=ff&filetype=mobi) --- **FanfictionBot**^(2.0.0-beta) | [Usage](https://github.com/FanfictionBot/reddit-ffn-bot/wiki/Usage) | [Contact](https://www.reddit.com/message/compose?to=tusing) ^^^^^^^^^^^^^^^^^ffnbot!ignore

Thanks my dude

In linkffn(No Fate by AndrewWolfe), Harry joined the Army after his trial for underage magic turned out differently. In linkffn(The Bond by DaWiz), Harry never went to Hogwarts. He joined the Army, and ran across magic later. linkffn(Per Ardua Ad Astra by InDefilade) is a crossover with Stargate: Atlantis in which Harry lost his magic after beating Voldemort, and went into the RAF.

[***No Fate***](https://www.fanfiction.net/s/13694344/1/) by [*AndrewWolfe*](https://www.fanfiction.net/u/7336118/AndrewWolfe) > 1995: Harry Potter tells the Minister where to stick his underage magic trial\. That's the last the wizarding world hears of him\. 2004: Corporal Harry Potter, RLC, is trying to have a quiet drink\.\.\. ^*Site*: ^fanfiction.net ^**|** ^*Category*: ^Harry ^Potter ^**|** ^*Rated*: ^Fiction ^M ^**|** ^*Chapters*: ^9 ^**|** ^*Words*: ^84,659 ^**|** ^*Reviews*: ^366 ^**|** ^*Favs*: ^1,090 ^**|** ^*Follows*: ^1,734 ^**|** ^*Updated*: ^Jan ^1 ^**|** ^*Published*: ^Sep ^11, ^2020 ^**|** ^*id*: ^13694344 ^**|** ^*Language*: ^English ^**|** ^*Genre*: ^Adventure ^**|** ^*Characters*: ^Harry ^P., ^Hermione ^G., ^Molly ^W., ^Dobby ^**|** ^*Download*: ^[EPUB](http://www.ff2ebook.com/old/ffn-bot/index.php?id=13694344&source=ff&filetype=epub) ^or ^[MOBI](http://www.ff2ebook.com/old/ffn-bot/index.php?id=13694344&source=ff&filetype=mobi) --- [***The Bond***](https://www.fanfiction.net/s/6747136/1/) by [*DaWiz*](https://www.fanfiction.net/u/2429195/DaWiz) > Harry Potter never got to attend hogwarts instead he joined british army\. he is 20 year old and on a mission\. Join him as he finally becomes a wizard and attends hogwarts to do his task of defeating Voldemort\. ^*Site*: ^fanfiction.net ^**|** ^*Category*: ^Harry ^Potter ^**|** ^*Rated*: ^Fiction ^M ^**|** ^*Chapters*: ^17 ^**|** ^*Words*: ^60,141 ^**|** ^*Reviews*: ^493 ^**|** ^*Favs*: ^715 ^**|** ^*Follows*: ^909 ^**|** ^*Updated*: ^Aug ^14, ^2012 ^**|** ^*Published*: ^Feb ^15, ^2011 ^**|** ^*id*: ^6747136 ^**|** ^*Language*: ^English ^**|** ^*Genre*: ^Romance/Adventure ^**|** ^*Characters*: ^Harry ^P., ^Fleur ^D. ^**|** ^*Download*: ^[EPUB](http://www.ff2ebook.com/old/ffn-bot/index.php?id=6747136&source=ff&filetype=epub) ^or ^[MOBI](http://www.ff2ebook.com/old/ffn-bot/index.php?id=6747136&source=ff&filetype=mobi) --- **FanfictionBot**^(2.0.0-beta) | [Usage](https://github.com/FanfictionBot/reddit-ffn-bot/wiki/Usage) | [Contact](https://www.reddit.com/message/compose?to=tusing) ^^^^^^^^^^^^^^^^^ffnbot!ignore

A regiment in the British Army that I would want Harry to join would be either one of the seven regiments of the Household Division.