Who needs night vision goggles and smart bombs? The Swiss used carrier pigeons and bikes (!) until very recently:

Switzerland has been neutral for 500 years, and these days it’s hard to imagine who might attack us or what enemy the army should prepare to fight. Thus over the course of the past several decades the army has acquired an increasingly quaint character. Carrier pigeons were used until 1994, and the bicycle units were disbanded only four years ago. And it wasn’t until the 1990s that the high command realized that two-thirds of the more than 20,000 fortifications scattered throughout the country were unnecessary and could be closed.