While Captain America has spent the better part of a century as one of Earth's Mightiest Heroes, he has had the opportunity to watch as many of its most astonishing changes took place. Unfortunately, the latest of these shakeups has come at the expense of mutantkind as a whole. With no X-Men to protect them nor a Krakoan home to call their own any longer, Captain America has taken it upon himself to stand up for those who are now so desperately in need of saving, even if it means letting go of his family-friendly superhero persona in favor of embracing his inner soldier.
Source:https://www.cbr.com/captain-america-inner-soldier-moments-marvel-comics/