The honorable Steve Rogers is a supersoldier who acts a sentinel of liberty to protect innocents when donning the star-spangled mantle of Captain America.[2] Initially rejected by the U.S. Army during World War II due to his frail physique, he volunteered for Project Rebirth. The experimental Super-Soldier Serum developed by Dr. Abraham Erskine greatly enhanced his body to the peak of human physicality.[55] Wielding an indestructible shield, Captain America is a master combatant who focus on acting defensively.[2] Alongside his partner Bucky[2] and the Invaders,[56] he helped the Allies win the war, but not before becoming lost at sea and frozen in ice in suspended animation for decades. Having been thawed out in the modern age, Captain America continued to fight for justice alongside his new teammates, the Avengers.[57] Being loyal to no politician or government, Captain America upholds the timeless principles of freedom, equality, and justice.[58] This has earned him an impeccable and inspirational reputation among the super hero community all over the universe.[45][59] Captain America usually struggles with the complexities of morally ambiguous endeavors. His activities, ideals and adventures led him in extraordinary situations as he battled for freedom and justice,[60] usually clashing with malignant tyrants, most prominently the macabre Red Skull,[61] but also forging deep friendship bonds, such as with the high-flying Sam Wilson for example,[62] with whom he shares the Captain America identity.[63]