Reinforcements on their own happen immediately and can be used / shot at depending on remaining orders available and who's go it is that turn. However if Pogues or Hurry up and wait has come up previously the reinforcements are delayed by a turn.
How is this delay applied if reinforcements come out mid turn as the result of a combat chip. Ie German reinforcements come out during Soviet (2nd )players turn. So should the reinforcements come out at the beginning or end of the Soviets next turn? This could make quite the difference on whether they get shot to pieces before moving into better cover.
Or if they came out in German (1st) player turn does he get them at the beginning or end of his next turn?