This is how WWII, G.I. Joe and a decorated U.S. Marine shaped Transformers

Following the end of WWII, American troops occupied the Japanese islands as the nation entered into the process of reconstruction. A key element in reviving the Japanese economy was its once prominent toy industry. However, with few raw materials available after the war, toy makers were forced to resort to unconventional sources.

American GIs occupying Japan were fed heavily with canned rations. It was the metal from these cans that was recycled and used to craft Japanese robot toys. To highlight Japanese craftsmanship, these toys were often motorized with clock mechanisms that allowed them to walk and roll.

The popularity of Japanese robot toys increased through the 1960s and 1970s. With the expansion of television, the robot toys were paired with manga comics and anime cartoons that engaged children and promoted toy sales. Japanese robot-based entertainment like Astroboy, Ultraman, Shogun Warriors and Gigantor became increasingly popular in America.

However, even the robots from the east couldn't compete with "A Real American Hero" like G.I. Joe. High sales of the action figure in the states were enough to convince Japanese toy maker Takara to license G.I. Joe for the Japanese market.

Having gained respect in the Japanese toy world for their toy dolls, Takara wanted to branch out and make a toy line for boys. However, G.I. Joe's iconic scar and grimacing expression were a bit too harsh and aggressive for post-war Japan. To market the toy to Japanese boys, Takara decided to make G.I. Joe into a superhero with superpowers. When the designers realized that G.I. Joe's body wasn't conducive to a superhero build, they resorted to type and made him into a robot. With a clear plastic body displaying his metal computer-like internals, G.I. Joe became Henshin Cyborg. Henshin meaning "transformation", this was the first step towards what we know today as Transformers.

Following the 1973 oil crisis, the 11.5" tall toy and all of its accessories became prohibitively expensive to produce. Like G.I. Joe in the states, Takara introduced the 3.75" tall Microman. A mini version of Henshin Cyborg, the Microman toy line focused even more on transforming toys with robots that could change into sci-fi spaceships. Microman was so popular that it was marketed in the US under the name Micronauts.

By the 1980s, robot toys that transformed into exotic spaceships were losing popularity. To rejuvenate the robot toy concept, Takara introduced the Diaclone Car Robo and Microman Micro Change lines. Diaclone toys transformed from robots into 1:60 scale vehicles like cars and trucks while Microman toys transformed into 1:1 replicas of household items like cameras, cassette players and toy guns.

At the Tokyo Toy Show, Hasbro executives took notice of Diaclone, Microman Micro Change and the plethora of other Japanese transforming robot toys and wanted to develop their own toy line. A deal was struck with Takara and Hasbro lifted almost every one of their toy lines for the US market, including Diaclone and Microman Micro Change.

To review, Hasbro licensed G.I. Joe to Takara in the 1970s. Takara turned G.I. Joe into Henshin Cyborg. Henshin Cyborg was shrunk down to Microman. Microman evolved into Diaclone and Microman Micro Change, both of which were licensed back to Hasbro. Things had really come full circle.

With all of these transforming robot toys, Hasbro turned to Marvel Comics to develop a backstory for the new toy line. Over a weekend, Marvel writers came up with the names and backstories for the first 26 Transformers as well as the plot for the first comic book issue.

Diaclone and Microman Micro Change robots were renamed and became Transformers as we know them today. Micro Car became Bumblebee, Cassette Man became Shockwave, Gun Robo became Megatron, Battle Convoy became Optimus Prime and the War for Cybertron between the just Autobots and the oppressive Decepticons was born. The first commercial for the Transformers toys introduced the now iconic jingle and the phrases, "Robots in disguise" and, "More than meets the eye."

The 1984 release of Transformers was a huge success netting Hasbro 5 million in sales. The popularity of the franchise was due in large part to the Transformers cartoon, the star of which was the venerable Optimus Prime.

Peter Cullen, the original voice of Optimus Prime, became so iconic that he was brought back to reprise the role of the Autobot leader in the 2007 Transformers film and its many sequels. Cullen, also known for voicing Eeyore in the Winnie the Pooh franchise, crafted the voice of Optimus Prime with inspiration from his older brother.

Marine Captain Henry Laurence Cullen, Jr., known as Larry, was a decorated veteran of the war in Vietnam. While serving with Kilo Company, 3rd Battalion, 5th Marine Regiment, 1st Marine Division, Capt. Cullen was awarded a Bronze Star with a V device as well as two Purple Hearts for his actions during Operation Hastings in June 1966.

When his younger brother told him he was going to audition for the role of a hero in a cartoon series, Capt. Cullen said, "Peter, if you're gonna be a hero, be a real hero. Don't be one of those Hollywood heroes pretending they're tough guys when they're not. Just be strong and real. Tell the truth. Be strong enough to be gentle."

With his older brother's words echoing in his mind, Peter Cullen delivered the strong yet gentle voice performance that Transformers fans today will always hail as the one, true Optimus.

"He had a lot of influence on me, you know, and especially coming back from Vietnam. I noticed somebody different," Cullen remembered of his older brother. "Going into that audition, Larry was with me. I mean, he was right there beside me. When I read the script, Larry's voice just came out. He was my hero."

From recycled ration cans, to a classic American action figure and an inspirational leader of Marines, the Transformers franchise has had a lot of American military influence to get to where it is today.

Featured image: (DreamWorks Pictures Paramount Pictures)