Typical Roman sacrificial procedure can be broken into five main elements, not all of which were required at all times. There could be considerable variation in how individual rites were conducted and the following procedure should be considered more of a general guide.

Generally speaking in a military context, if a dedicated priest (Sacerdos) was not available to conduct the rite, then the highest ranking individual present in the unit would be responsible for doing so on everyone's behalf. However, this individual may delegate the duty to another member of the unit. In this sense, the rites are still conducted by the senior ranking individual through his delegated intermediary.

If a delegate is used, then the senior officer present should nominate the individual as follows:
'{name} I delegate you to conduct the sacrifice'.
The individual conducting the sacrifice must now cover his head, either with his cloak or with his toga, as a sign of respect to the gods and in preparation for the sacrifice.

The five main elements are as follows:

Praefatio: preliminary sacrifice

Precatio: main sacrificial prayer

Redditio: main sacrificial offering

Profanatio: if offering is consumable, then
excess is profanated for human consumption

Epulum: feast/banquet in which excess
food is consumed by participants