Quote Originally Posted by NichG View Post
You can't whammy another human with 5 minutes of conversation so they'll follow you until death. But you can certainly live with them in a way that sustains their loyalty. It's not fire-and-forget, it's systemic practice.
Another example - loyalty of samurai towards their lords. While it's certainly variable and it's mostly viewed with rose-coloured glasses, the culture was there to instil loyalty, sometimes in a manner that would be completely alien to us today.

As an example, there were enough cases to warrant the prohibition of junshi, a form of ritual suicide where a samurai followed his lord, due to it being considered a waste of good manpower. The most famous case of junshi are the 47 Ronin.

There's also plenty of cases where troops were fanatically loyal to their commander, for example Caesar's 10th Legion who demanded to be decimated for cowardice after they fled a battle (each individual squad would draws lots - the one who drew the short straw would be beaten to death by his squadmates).