Minuteman IIIs initially deployed with the older W62 warhead; the W78 was deployed starting in December 1979 onto 300 missiles, three warheads per missile.
Minuteman III awalnya dikerahkan dengan hulu ledak W62 yang lebih tua; W78 dikerahkan mulai bulan Desember 1979 rudal ke 300, tiga hulu ledak per rudal.