Here’s a list of free LEGO military instructions from various places on the web.
(Updated 05-29-17 with notes about broken links.)
– W2daern HALO: Scorpion, Warthog
– Sfzdk (Note: Brickshelf.com seems to have shut down.)
– Legohaulic: Humvee
– Mechdinosaur: AAVP7A1
– Taddydaddy: v1 Humvee, v2 Humvee, Ford GPA, Generic military jet (Also has many other instructions!)
– LegoWW2WillysJeep: WWII Jeep
– LegoAnimat (Mostly guns)
– Mikepsiaki: Huey Helicopter (Note: Brickshelf.com seems to have shut down.)
– Marklegoboy: AA Gun
– Legoguy830: Sandbags, Howitzer, Tank Trap
– Brian Fitzsimmons (Many WWII vehicles)
– TheLegoww2studios: WWII Jeep, Anti-tank gun
– Paul Canfora: Abrams Tank
– MaksM: Humvee (Note: Brickshelf.com seems to have shut down.)
– Pit: Cobra Water Mocassin (Note: Brickshelf.com seems to have shut down.)
– cubiculus.com: Panzerkampfwagen IV, T34 Tank, Sherman Tank (Note: Cubiculus seems to have shut down.)
– Phoenix Knight: Generic mini tank
– LA-Design (Variety of stuff)
– Alpha Company (Note: Alpha Company seems to have shut down.)