https://en.wikipedia.org/wiki/United_States_Army_Special_Forces_selection_and_training

Army special Forces "Q" Course

The Special Forces Qualification Course (SFQC) or, informally, the Q Course is the initial formal training program for entry into the United States Army Special Forces. Phase I of the Q Course is Special Forces Assessment and Selection (SFAS).[1] Getting "Selected" at SFAS will enable a candidate to continue to the next of the four phases. If a candidate successfully completes all phases he or she will graduate as a Special Forces qualified soldier and then, generally, be assigned to a 12-man Operational Detachment "A" (ODA), commonly known as an "A team." The length of the Q Course changes depending on the applicant's primary job field within Special Forces and their assigned foreign language capability but will usually last between 56 and 95 weeks.