Doctor Guy L’Estrie was one of France's leading scientists in the field of robotics and cybernetics. He helped strengthen, L’Estrie Industries, a firm that was founded by his father, by entering the company into the manufacturing of high tech robotics, and to a lesser degree cybernetics.

The company grew quickly, becoming a major player in the European marketplace. However, this notoriety brought the company to the attention of Sterling House, a wealthy financial company from England. The leader of Sterling House was Jonathan Sterling, the uber known as Sterling and the leader of TITAN. Sterling House sought to take over L’Estrie Industries, but Guy held the majority of stock in the company and blocked the takeover.

This enraged Sterling to no end. He dispatched the German powerhouse Rage to deal with the reluctant Frenchman. Rage was supposed to encourage the doctor into selling his stocks to Sterling House, but things went terribly wrong. Rage cornered Doctor L’Estrie at his remote research and development laboratory in Strasbourg. The German seriously hurt the doctor and left him for dead.

He would’ve died too, if his nephew Rene hadn’t showed up. Rene was also attacked by Rage and was seriously hurt. Later he lost the use of his lower body and became wheelchair bound. However before that, Rene was able to rebuild his uncle using the laboratory. However, there were a lot of changes to Guy. He had to replace all of his limbs with cybernetic replacements.

Since that day, Guy, who goes by the code name Bras Fort or Armstrong has battled crime not only in his native France but across Europe as well. During his adventures he has made friends with the German uber Steppenwolf, and the German convinced him to partner with him for awhile. However, they later decided to work solo as well. Every once in a while they get together with other European ubers in a loosely based group known as the Brotherhood. Guy has also given his shares in L’Estrie Industries to his sister so that he could concentrate on his crime-fighting.

Armstrong is very much a thinker. He gets really involved with his research; often losing track of time. When doing research, Guy can spend days in his labs without knowing about the loss of time. Guy feels really badly about his nephew becoming wheelchair bound, and strives to make up for it by doing heroic things.

“I think zat a vell placed punch to ze solor plexus should do ze job nicely.”

Both of Guy's arms and legs have been replaced with titanium alloyed cybernetic prosthetics. With his new arms and legs Armstrong becomes incredibly strong. His cybernetic arms allow Armstrong to reach over distances, and his legs telescope allowing him to run incredibly fast. Due to the addition of the cybernetic limbs, Armstrong had to reinforce his torso to carry all the extra weight. This reinforcement acts as armor for Armstrong. In addition to the reinforcement, Armstrong also has a built-in oxygen supply.

Armstrong is a modified man. His arms and legs have been replaced with cybernetic prosthetics, which Armstrong is able to telescope at will. For a costume Armstrong wears a blue, white, and red jersey with a pair of black bicycle trunks. He wears black gloves on his hands as well, and black shoots. Due to the effects of the cybernetics on him, Guy doesn’t try to maintain a secret identity.