The most powerful weapon in any army's arsenal isn't a nuke--not even one of those big nukes that shoots smaller nukes. No, no weapon or technology can stand up to the classic military mindfuck.
Strategists have been using it for millennia and perhaps none did it better than these guys:
6Chuko Liang and the Lute of Death
Chuko "Sleeping Dragon" Liang was a brilliant Chinese strategist and possessor of one of the top 10 awesomest nicknames in history. A chancellor of Shu Han during the third century, his cunning is widely so celebrated that in China his name is synonymous with intelligence and tactics, which is way better than General Tso, who only wound up with a Chinese restaurant dish named after him.
"No, General Tso, it is your chicken that is weak and lacking in discipline."
Chuko was a master of the mindfuck. But he was still capable of making mistakes and it was his greatest miscalculation that required him to draw upon his greatest of mindfuck powers.
According to historians, during the War of the Three Kingdoms, accompanied by a consort of just 100 soldiers and the rest of his army miles away, Chuko saw an opposing army with over 100,000 men marching towards him. The opposing general, Sima Yi, was a veteran who had fought Chuko in multiple battles. Familiar with the Sleeping Dragon's clever ways and, deciding to take no chances, he led the massive army to capture Chuko.
Ordering his few men into hiding, Chuko commanded that the town gates be left wide open and, positioning himself atop the city wall, he proceeded to play the lute as the massive enemy army approached. Upon his arrival at the town gates, Sima Yi, who had fallen victim to many a Chuko-led ambush, halted his army and studied Chuko's calm manner as he ripped a solo on the chords.
Convinced it was a trap he could not yet comprehend, Sima commanded a hasty retreat, more than a 100,000 soldiers pulling back from one man and his musical instrument. Chuko thus earned an entire wing in the Bullshitter's Hall of Fame.
5Cambyses II of Persia: Master of the Catfight
The Battle of Pelusium in 525 B.C. was a mindfuck of godly proportions. Literally.
Egypt was being invaded by the Persians, lead by Cambyses II. At the time, Egypt was at the zenith of their wealth and power. They also were at their most zealous for their religious beliefs, based around a variety of animals they considered holy. The Egyptians remained convinced that their gods would continue to shower good fortune upon them so long as they were treated with due respect and awe.
Cambyses knew this, so he brought along to Egypt a zoo's compendium of every animal they thought was holy. He also painted the image of the Egyptian feline goddess, Bastet, on the shields of his soldiers. The result was that during the battle, many of the Egyptian soldiers refused to fight back lest they strike the holy image, bringing the wrath of Bastet upon them.
After dealing the hesitant Egyptians a resounding defeat, Cambyses pursued them to the fortress of Pelusium. Unwilling to deal with a protracted siege, and to amuse himself, Cambyses decided to release a wave of cats to charge at the fort. This prevented the soldiers from shooting arrows at the advancing Persian army, for fear of hitting the sacred cats. The Egyptians were so concerned with the vengeful hands of their gods that they ignored the ones swinging scimitars right at their faces.
The victory ushered the end of Egyptian sovereignty for centuries to come. It was annexed to Persia and then tossed back and forth between different empires before ultimately falling into the hands of the Romans. As if all that wasn't enough, when he won Cambyses laughed and hurled cats at the faces of his defeated foes. No, Seriously.