For 10 points, name this institution established by the Selective Service Act, which is the forcible conscription of citizens into military service.
The Supreme Court ruled this practice constitutional in Arver v. United States. In the 1970s, it was accomplished through a procedure in which drawings were conducted from a jar containing 366 blue capsules. Protests against it were at the center of United States v. O'Brien. Students protested against it by burning certain cards and could avoid it by fleeing to Canada. For 10 points, name this institution established by the Selective Service Act, which is the forcible conscription of citizens into military service.
The Supreme Court ruled this practice constitutional in Arver v. United States.
the draft [or equivalent answers such as conscription; or Selective Service before it is read]