The Swedes are developing thermal cloaking technology. I have never been so afraid of Scandinavia in my life. Infra Red Cloak Defence Sytem Developed By BAE In Sweden Can Make A Tank Invisible To The Enemy | Technology | Sky News And be sure to watch the linked video: Adaptiv video - BAE Systems And to add insult to injury, the tanks are also painted in razzle dazzle (ish) camoflage!
The Swedes are awesome, they have hidden fighter jet bases inside of mountains and now cloaking tanks! Note to self: don't invade Sweden.