10 Biggest Mistakes Made By MCU Heroes

Tony made no attempt to change Stark Industries' business model after becoming its CEO. On the contrary, he threw himself into the role wholeheartedly, designing ingenious new weapons like the Jericho missile.

Sadly, Tony's brilliance in creating weapons was not matched by his efforts to ensure that they didn't fall into the wrong hands. Thanks to Tony's failure to keep track of his weapons, not to mention his inability to realise that his business partner Obadiah Stane was corrupt and ruthless, Stark Industries' weapons were used against civilians and US soldiers.

Tony was forced to confront the truth behind his success and riches when he learned that Stark weapons had fallen into the hands of the Ten Rings, and experienced first-hand the harm they could do.

Even after learning from his mistake and putting Stark Industries on a new course, the legacy of Tony's arms dealing would return to haunt him when Wanda and Pietro Maximoff joined forces with HYDRA and Ultron to avenge the deaths of their parents, who had been killed by a Stark explosive.