File:'Can Do' Soldiers, students build Lego robot car for science 111615-A-XX999-022.jpg - Wikimedia Commons
Since you asked for it in my minifig only robot army post, here is my whole robot army in all its glory - with vehicles! Will post my Exo force army, too,
EOD Disposal Team and Robot US NAVY made with real LEGO® bricks and minifigure | eBay
The military mech with the gleaming eye - The Brothers Brick | The Brothers Brick
How to make a LEGO military robot (easy) |Tutorial - YouTube
JitteryGit Army Dinosaur Robot Stem Building Toy | Gifts for Boys Ages 6 7 8 9 10 11 - Walmart.com
Amazon.com: MyBuild Mecha Frame Armed Forces Stryker Toy Building Sets Robot Mech Armor and Truck Military Cargo MTVR 7001 : Toys & Games
LEGO IDEAS - Utapau Battle-Pack: Techno Union Droid Army