You can see the full category hierarchy on the Category Map.

Loose apronyms:
Perfect Apronyms OnlyAll Apronyms
100% AIR FORCEArmed Individuals Regularly Fly On Reconnaissance (Covert) Exercises Top-Gun McCoy O'Grady
100% ALABAMA (2)Americas Largest Active Battleship Alabama, Mobile Area Jan Morgan - Can Be toured here it saw action in WWII and was the largest ever built
Places:States & Regions
100% ALLIANCEA Large League Is Always Necessary Combatting Evil Tony McCoy O'Grady
People & Relationships
100% ANZACArmy Needed Zeal And Courage Tony McCoy O'Grady (ANZAC actually stands for Australian and New Zealand Army Corps)
Re-expansions of existing acronyms
100% ARCHERArrows Really Can Hurt Enemy Rogues Tony McCoy O'Grady
100% ARCHERYArrows Rarely Cross Hearts - Excepting (Romantically) Yours Rico Leffanta
People & Relationships:Love & Lust
100% ARLINGTONArmymen's Remains Laid In New Graves, They're Organised Neatly Tony McCoy O'Grady - Arlington is a (the?) major US military cemetery
86% ARMADAA Raiding Marine Army Drowned (or) Aground Tony McCoy O'Grady
100% ARMYA Rifle Motivates You Blair
80% ARMY (2)Aren't Ready [for] Marines Yet If you think the US Navy and the US MARINEs dump on each other, try the US Navy vs the US Army (reference the Army-Navy Football game played every year in Philadelphia, PA, USA). Here's an example of a dump from an ex-US Navy vet.
100% BOMBERBillions Of Megatons Bring Earthly Ruin Tony McCoy O'Grady
100% BOWMANBent Over Weapons, Many Arrows Needed Tony McCoy O'Grady
88% CAMP FOXCourtesan's A Military Prostitute - Financed Outta X-factor Tony McCoy O'Grady - who just discovered that British service personnel are paid an 'X-factor' to compensate for the disruptions and disadvantages of life in the armed forces..... and thought "what better way for a soldier to spend his X-factor than on a Camp Follower - maybe even a foxy one.
People & Relationships:Love & Lust
100% CAPTURECopse Attack! Plot Tracks! Unnameable Rewards! Existence! Charles H. Montgomery, Jr. Capture escapee.
100% CAVALIERCharles' Allies Victorious Against Loathsome Illicit Emergent Roundheads TMcCO'G
100% DISARMDetectives Insist Submachineguns Are Removed Masterfully Tony McCoy O'Grady
100% DRAFTDeserters Resisted Armed Forces Training Tony McCoy O'Grady
67% DUKE (2)Dangerously Using Karate (in an) Encounter Dustan Dowsing
100% ENOLA GAYExploring Nippon Over Land Awakens Grisly Atomic Yesterdays Rico Leffanta
100% FORTForearmed Outpost Repels Tresspassers. Roger Williams
100% FORTRESSFamily Of Ruler Took Refuge, Escaping Shooting Soldiers Tony McCoy O'Grady
100% FYRDForced Youth Recruitment Decreed Angela Brett
100% FYRD (2)Former Yoemanry Regular Division Tony McCoy O'Grady
100% FYRDSFor Year-Round Defense Services Angela Brett
100% GUN SALUTEGive Umpteen Numbered Shots As Laurels (Usually Toward Elsewhere) Angela Brett
100% HIT THE GROUND RUNNINGHelicopter Ingests Troops, Travels, Hastily Evacuates. Guys Running Out Under Nasty Deadly Riflefire, Usually Need No Incitement. Nearly Gallopping. TMcCO'G, who doubts that troops debarking from a helicopter, under fire, need to be told to "hit the ground running".
Assorted Phrases:Sayings
100% IMPRESSEDIf Military Personnel Require Extra Servicemen, Shanghai Eligible Drunks Tony McCoy O'Grady - referring to the Press Gangs of the Royal Navy who 'kidnapped' men to fill out the crews of ships in days gone by
100% JOUSTJoy Of Using Spear Thingies Tony McCoy O'Grady
100% KNIGHTKilled Nasties In Glorious Heroic Times Tony McCoy O'Grady
86% LEGIONLatin-speaking Expert Gladiators In Outstanding Numbers Tony McCoy O'Gladiator
90% LOGISTICSLong-distance Operation Generally Involves Shifting Things Into Certain Sites Tony McCoy O'Grady
100% LOGISTICS (2)Large Operation Gets Items Shipped To Infantry's Complete Satisfaction Tony McCoy O'Grady
100% MARCH (3)Most Armies Rhythmically Continue Hiking. Angela Brett
100% MARINEMuscles Are Required, Intelligence Not Essential The US Navy and the US Marines have a log tradition of dumping on each other. Here's one example from a US Navy Vet.
People & Relationships:The Workforce:Occupations
100% MARINE (2)My Ass Rides In Navy Equipment More US Marines-Versus-US Navy bashing, as brought home by one of my Navy friends, Col Myers.
100% MARINESMen Armed, Ready If National Emergency Strikes Tony McCoy O'Grady
100% MILITARY INTELLIGENCEMainly It Looks Into Things About Rank&file. Yet It's Not Terribly Exact. Large Lapses In Guesswork, Evidently Never Called "Errors" TMcCO'G, who thinks that Military Intelligence is largely guesswork, and no amount of hindsight can ever prove otherwise.
100% MILITARY TERMSMisinformation Is Largely Its Target - All Reports You Think Exact Really Mislead Someone Tony McCoy O'Grady
100% NAVYNumerous (And Violent) Yachts Tony McCoy O'Grady
100% NAVY (2)Never Again Volunteer Yourself. Was in the US Navy for 6 year as a volunteer (draftees not accepted). Enough said.
100% OCEANOverflow Can Evaporate Any Navy Rico Leffanta
100% PEACEPerhaps Enmity's At Complete End Tony McCoy O'Grady
People & Relationships
100% PENTAGON (6)Practises Every Night To Attack Governments, Overthrow Nations Chris Kjelgaard
100% PENTAGON (8)Posits Enemies, Nuclear Threats And Gets Official Nod Chris Kjelgaard
100% PENTAGON (10)Practically Every Newly Trained Army Grunt Overseas Now Chris Kjelgaard
100% ROVERRemotely Operated Vehicle - Elevated Reconnaissance Tony McCoy O'Grady, saying: You know the remote-controlled aircraft used to spy over unfriendly territory? Well I don't know what they are called but they could be called ROVER. (Angela added that they're called Unmanned Aerial Vehicles, or UAVs)
100% RUMSFELDRemarkably Unpleasant Man, Supercilious For Every Live Debate Chris Kjelgaard
Names:Famous people:Politicians
100% RUMSFELD (2)Recklessly Unrepentant Minister Shows Foreigners Extremely Lethal Displeasure Chris Kjelgaard
Names:Famous people:Politicians
100% RUMSFELD (3)Reactionary Upstart Makes Sure Forces Engage Less-Developed Chris Kjelgaard
Names:Famous people:Politicians
100% SOLDIERSSlaying's Our Loyal Duty... Insufferable Enemies Ruthlessly Slaughter Angela Brett
100% SQUADSpecial Quorum Under Army Directions TMcCO'G
100% TARGETTaking Aim, Raise Gun, Embrace Trigger Tony McCoy O'Grady (One is always advised to 'squeeeeze' a trigger slowly, rather like embracing a partner, and not jerk it!)
Sports & Recreation
100% UNARMEDUsing No Ammunition, Righteous Man's Enemies Defeated Tony McCoy O'Black-belt-in-Karate
100% USA PATRIOTUsing Superior Armed Power, America Threatens Recalcitrant Individuals Opposing Them Tony McCoy O'Grady - see CLIMATE VISION
Re-expansions of existing acronyms
100% YELLOW (4)Yell Enemy Lax Leaving Outlying Weapons Charles H. Montgomery, Jr.
People & Relationships:Personality Traits