Delta Squad have at least two separate rules about killing enemy:
Rule #1: Kill them before they kill you. Rule #17: Always make sure they’re dead.
As game dialogues implies, rule #17 was used in practice by Deltas
Scorch: D'ya have to make such a mess? Sev: Rule 17: Always make sure they’re dead. Scorch: It looks dead to me. Sev: It is now.
or
Scorch: Sev, did that corpse give you a nasty look? Sev: Rule 17… Scorch: Yeah yeah we know, always make sure they’re dead.
thus we may safely assume that the practice also applied to wounded enemies.
ARC A-17 (better known as just Alpha) shares a similar mindset, as was seen during the Jabiim campaign, as he opted to kill injured enemy soldiers.
Which is no surprise that Jango described Delta Squad as deadly, relentless, antisocial and aggressive and specifically compared Deltas to ARC Alpha Batch he personally trained.
This implies how similar Jango Fett and Walon Vau are when it comes to dealing with enemies - something that may be influenced by True Mandalorians’ conflict with Death Watch (as in, if you let one enemy live, the enemy will regroup and strike you again). But what is also interesting - is this Jango and Walon's mindset specifically or is it more True Mandalorians' thing in general? Or additionally, did Fett (and unknowingly his people) train clones to kill even the injured enemy to ensure that once Order 66 will be issued, they won't show any mercy to the Jedi?
