Wis. Stat. § 39.48

If a student who is a resident of Wisconsin and a member of a national guard or a member of a reserve unit of the U.S. armed forces withdraws from a private nonprofit college or university located in this state after September 11, 2001, because he or she is called into state active duty under ch. 21 or into active service with the U.S. armed forces for at least 30 days, the college or university shall, at the student's request, grant the student an incomplete in all the courses and permit the student to complete the courses, within 6 months after leaving state service or active service, without paying additional tuition or fees.