Veteran: Is everyone on the mission a Specialist or Soldier? Take +1d.
Rookies are not Specialists or Soldiers, so if your squad includes any Rookies, you do not get this die.
Are this options really happened to anyone? (sorry for my english).
Yesterday night was playing our Band of Blades session, I’m the Marshal and reading, again, this question and the bonus dice made me angry because seems to me that we can never achive/reach the situation.
Soldiers can be moved around as Dr_NANO suggested. It’s very common as soldiers promote to make one squad of all-soldiers. You almost never send that squad on secondary missions (or you lose soldiers) but it’s not uncommon after say ~5-6 missions.