Space Marines are elite soldiers in the Warhammer 40,000 universe, known for their superhuman abilities and advanced technology. They are genetically enhanced warriors, created from the DNA of the Emperor of Mankind, designed to protect humanity from various threats, including aliens and chaos forces. Each Space Marine belongs to a specific chapter, such as the Ultramarines or Blood Angels, each with its own unique culture and combat style. They wear powerful armor called Power Armor, which enhances their strength and resilience, making them formidable on the battlefield.