The Nazis seemed to have limitless endurance and strength, only to eventually be undone by the affects of what's now known as methamphetamine. A pill known as Pervitin, widely used by Hitler's army and Hitler himself, was one of the reasons the Axis Power became a little too ambitious. Apparently, there's something more powerful and more dangerous floating around war zones like Syria: Captagon.

According to a Reuters report published in 2014, the war has turned Syria into a "major" amphetamines producer -- and consumer.

"Syrian government forces and rebel groups each say the other uses Captagon to endure protracted engagements without sleep, while clinicians say ordinary Syrians are increasingly experimenting with the pills, which sell for between $5 and $20," Reuters reported.

Captagon has been around in the West since the 1960s, when it was given to people suffering from hyperactivity, narcolepsy and depression, according to the Reuters report. By the 1980s, according to Reuters, the drug's addictive power led most countries to ban its use.

The United State classified fenethylline ("commonly known by the trademark name Captagon") as a Schedule I drug under the federal Controlled Substances Act in 1981, according to the National Criminal Justice Reference Service.

A drug control officer in the central city of Homs told Reuters he had observed the effects of Captagon on protesters and fighters held for questioning.

"We would beat them, and they wouldn't feel the pain. Many of them would laugh while we were dealing them heavy blows," he said. "We would leave the prisoners for about 48 hours without questioning them while the effects of Captagon wore off, and then interrogation would become easier."

One secular ex-Syrian fighter who spoke to the BBC said the drug is tailor-made for the battlefield because of its ability to give soldiers superhuman energy and courage:

"So the brigade leader came and told us, 'this pill gives you energy, try it,' " he said. "So we took it the first time. We felt physically fit. And if there were 10 people in front of you, you could catch them and kill them. You're awake all the time. You don't have any problems, you don't even think about sleeping, you don't think to leave the checkpoint. It gives you great courage and power. If the leader told you to go break into a military barracks, I will break in with a brave heart and without any feeling of fear at all — you're not even tired."

In case you think that the fighters of Daesh are Islamic in their ideology, keep in mind that Islam clearly forbids any mind-altering drugs, especially illegal substances, as well as alcohol. From the 'Christian' immigrant-fearing people in America to these 'soldiers of Islam,' hypocrisy seems to accompany malevolence anywhere it rears its ugly head.