The United States Army Special Forces, commonly known as the Green Berets, are a highly skilled and specialized group of soldiers trained to execute unconventional warfare missions. There are several synonyms used to describe these elite soldiers, including Special Forces, SF, Army Special Forces, and simply Green Berets. Other terms used to characterize their role and capabilities include Special Operations Forces (SOF), Tier One Forces, and the tip of the spear. Some also use the acronym ODA, which stands for Operational Detachment Alpha, to refer specifically to the small teams of Green Berets who carry out these high-stakes missions. Whatever the terminology, the United States Army Special Forces are widely recognized as some of the best-trained and most effective fighters in the world.