NPCs

Player characters cannot fight, survive, wheel, deal, plot, or scheme without interacting with non-player characters (NPCs). Indeed. the very heart of the AD&D game is the relationship between player characters and non-player characters. How the player characters react to and treat NPCs determines the type of game the group plays. Although many choices are possible, players quickly find that consideration and good treatment of NPCS is the most frequently successful route.
An NPC is any person, creature, or monster that is controlled by the DM. Most NPCs are either people (intelligent races that live in local society) or monsters (intelligent and unintelligent creatures that aren't normally found in towns and villages). The term "monster" is only a convenient label. It doesn't mean the creature is automatically dangerous or hostile. Likewise, NPCs who are people aren't uniformly helpful and cooperative. As with all things, the range of possible reactions of NPCs to PCs covers the entire spectrum.
In the course of their adventures, player characters will be most concerned with three groups of NPCs: hirelings, followers, and henchmen. It is their aid that helps player characters vanquish deadly monsters and accomplish mighty deeds. As their names imply, these NPCs can be persuaded in various ways to join the player characters in their adventures. The most common methods of persuasion are money and loyalty.

Hirelings

The most frequently employed NPC is the hireling. A hireling is a person who works for money. Most hirelings have fairly ordinary skills, while others are masters of a craft or art, and a few are experts of specialized adventuring skills. Typical hirelings include the following:

Archer
Armorer
Baker
Bladesmith
Jeweler
Messenger
Sage
Spy

Architect
Assassin
Blacksmith
Foot Soldier
Laborer
Minstrel
Sailor
Thief

Hirelings are always employed for a stated term of service or for the performance of a specific task. Thus a mercenary contracts to serve for a season. A thief can be hired to steal a named item. A sage works to answer a single question. A blacksmith may indenture himself for a term of years. A sailor works for a single voyage. Quite often these contracts can be renewed without difficulty, but the only thing that binds a hireling to the player character is regular pay and good treatment. Hirelings do not serve a PC out of any great loyalty.
Thus there are some things hirelings will not do. Most hirelings do not foolishly risk their lives. There are soldiers willing to take their chances on the field of battle, but even these courageous (or foolish) few do not willingly undertake the greater hazards of adventuring. They man castle walls, guard caravans, collect taxes, and charge the massed foe well enough, but they often refuse to accompany a PC on an adventure. Even a hireling who regularly undertakes dangerous missions (a thief or an assassin, for example) normally refuses to join player character parties. These hirelings are loners. They contract to do a job and get it done in their own way, without interference from anyone else.
Hirelings are no more loyal than human nature allows. For the most part, if paid and treated well, with opportunities to realize their ambitions, working for a charismatic leader, hirelings can be relied on to do their jobs faithfully. But poor pay, injustice, discrimination, threats, abuse, and humiliation at the hands of their masters make them somewhat less than reliable. A smart leader sees to the comfort and morale of his men before his own concerns. With less savory characters — those hired to perform dark deeds — the player character takes even greater chances, especially given the questionable morals of such characters.
Whatever their personalities, hirelings generally need to make morale checks whenever they are faced with a particularly dangerous situation or are offered a bribe or other temptation.
Finding hirelings is not difficult. People need jobs. It is simply a matter of advertising. Under normal circumstances, applicants respond to ads. Only when trying to employ vast numbers or hire those with unusual specialties (such as spies) does the process become complicated. Just what needs to be done in this situation depends entirely upon the DM's campaign. Your character may have to skulk through the unsavory bars of the waterfront, rely on questionable go-betweens, or pay a visit to the thieves' guild (if there is one). Just employing one of these characters can be a small adventure in itself.
Employment costs of hirelings vary from a few gold pieces a month to thousands of gold pieces for an especially dangerous task. The skill and experience of a hireling has a great effect on his salary. A learned sage researching some obscure piece of lore can charge hefty sums. Costs can also be affected by the conditions of the campaign — the setting, the recent events of the world, and the reputations of the player characters (if any). Most hirelings sign on for what they think is fair. While few will turn down more money, most will drive the best bargain they can. Your DM has more information about employment costs, since he may need to alter these to fit his campaign.

Followers

More reliable than those who are motivated purely by money are those characters who, while they pay, were originally drawn into service by the reputation of the player character. These are followers, usually a unit of soldiers of one type or another. Followers serve only those of significant power and reputation, thus the construction of a stronghold is necessary to attract followers.
Followers have the same needs and limitations of hirelings. Most must be paid and well-treated. They also do not accompany the player characters on group adventures. They have some advantages over hirelings, however. Followers do not serve for a specific term of contract. They remain with the player character as long as their basic needs are met. They are more loyal than the average hireling and are treated as elite troops.
Unlike most hirelings, followers can increase in level (although this occurs very slowly since they act only as soldiers). All followers in a unit advance to the next level at the same time. Finally, the player character need not seek out followers — they come to him, seeking positions within his illustrious household.
Followers appear only once. Replacements do not arrive to fill the ranks of the fallen. Massive losses of followers in combat only gives the character a bad reputation, discouraging others from flocking to his banner. Player characters should take care of their followers, perhaps treating them as an elite bodyguard.
Some characters attract unique followers such as animals or magical beings. Although termed followers, these creatures are more properly treated as henchmen in terms of loyalty and what they will and will not do. They do not count against the character's limit on henchmen, however, since they are technically followers.

Henchmen

Henchmen are much that hirelings are not. They are adventurers who serve out of loyalty. They are willing to risk their lives for those they respect. They are also hard to find.
Henchmen are powerful allies to a player character. Unlike hirelings, they have the nerve and ability to become powerful adventurers. Although they expect their share of treasure, they do not usually join a player character for money. They are attracted to the PC because of his reputation or other qualities he possesses. As such, henchmen cannot be expected to flock to the banner of a neophyte adventurer. He may gain himself one or two companions, but others come only when he has earned a greater reputation, met more people, and proven himself a true friend and ally to these NPCs.
Henchmen can come from any source. Most often they are at first mere hirelings or followers who, through distinctive actions, come to the attention of the player character. Some may be higher level, more skilled hirelings who develop a bond to the player character through long employment. Others may be followers who have sound advice for the player character.
A henchman is always of lower level than the PC. Should he ever equal or surpass the PCs level, the henchman leaves forever; it is time for him to try his luck in the real world. In some ways, the player character is the mentor and the henchman his student. When the student has learned as much as the teacher, it is time for him to go out on his own.
Henchmen are more than just loyal followers; they are friends and allies. Naturally they expect to be treated as such. They have little need for those who do not trust them or treat them coldly. Abusiveness or taking advantage of the friendship quickly ends the relationship. Just as players must with their own friends, player characters must be sensitive to the needs and feelings of their henchmen. Furthermore, henchmen attach themselves to a particular player character, not a group of player characters. Thus it is only under the direst of circumstances that a henchman accepts the orders of another PC. Should his friend (the player character) fall, the henchman sees to his needs. He doesn't abandon him and continue on with the other player characters unless this is clearly the only way to aid his friend.
A PC's Charisma determines the maximum number of henchmen he can have. This is a lifetime limit, not just a maximum possible at any given time. In a world where the fallen can be restored to life, it is expected that a man would make this effort for his dearest friends, both player characters and henchmen. For example, Rupert the half-elf has had seven henchmen, but all have fallen for one reason or another. Rupert's Charisma is 15, so with the death of his latest henchman, no more come to join him. (Word has obviously gotten around that Rupert's friends tend to meet unpleasant ends, and he doesn't even have the decency to bring them back to life! Even if he had tried to raise his henchmen and failed, Rupert would still be viewed as a jinx, bad luck for those around him.)
Attracting a henchman is fairly difficult. One cannot advertise for friends with any great success. They grow and develop from other relationships. A henchman can be found by placing trust in a skilled hireling. Heroic deeds (saving the life of an NPC) can create a strong and instant bond. Love certainly can form this bond. The player and the DM must trust their own judgment to determine when an NPC becomes a henchman. There is no clear line an NPC must cross to make the transition from hireling to henchman. Instead, it is a slide from one status to the other.
Once an NPC becomes a henchman, the player gains a high degree of control over the character. He should be responsible for the record keeping for that character. It is almost, but not quite, like having a new PC for the player. If the DM allows it, the player can have all information regarding the abilities of the henchman, although the DM may choose not to reveal this information. The player is allowed to make nearly all decisions for the NPC, but the DM can overrule any action as being out of character.
There are certain things henchmen do not do. They do not give away or loan out magical items. They do not allow others free access to their spell books. They do not tolerate spell use that questions their loyalty (detect lie or know alignment cast upon them). They do not accept less than their due share. In general, within these limits, henchman do what is desired of them. The DM can at any time dictate the actions of a henchman, since the character is still an NPC.
If a PC is not attentive to the wishes and needs of his henchmen, or if he abuses and humiliates them, he can expect the worst. This is the stuff mutinies and rebellions are made of. Should an abusive player character fall at the hands of a once-loyal henchman, he has only himself to blame.
On the other hand, not all henchmen are paragons of loyalty. The player character must always be aware that henchmen are sometimes not what they seem. They can be a means to get at the player character. Throughout history, many a cruel and cunning villain has posed as a true companion, waiting his chance to strike or spy on his friend.

Player Character Obligations

Whenever a player character takes on a hireling, follower, or henchman, he has committed himself to certain obligations and customs that surround such agreements. Some of these are obvious, having been worked out between the player character and the NPC in advance. Usually the wage and term of service are settled upon before any agreement is reached.
For hirelings and followers, this is a set amount of money each day, week, or month, or a fee for a specific task. Henchmen commonly receive a portion (1/2 a normal share) of all treasure and magic found on adventures. A player character is normally expected to contribute a little more from his own funds. however.
Other obligations of the player character are varied. Some must always be considered, while others almost never come into effect. A player character is expected to provide meals and boarding (unless the NPC has a home nearby). This is the most common obligation and applies to NPCs of all walks of life. For those engaged in more dangerous pursuits, however, additional concessions must be granted. Since horses are expensive, player characters should be ready to cover the cost of mounts lost in combat or on campaign. It is unreasonable to expect a mercenary to buy a new mount from his meager savings. Likewise, other items of war craft—weapons and armor— must be replaced by the player character.
All soldiers are expected to provide their own equipment when they are first employed, but the player character must replace all losses. Certainly all player characters are expected to pay the cost of special transport—securing passage on ships and arranging wagons for baggage. Of the grimmer duties, player characters are expected to pay for a decent (though hardly lavish) interment.
One of the more unusual obligations of a player character is to ransom his men. This is especially true of men lost during a campaign. The greater number of soldiers lost in a battle are not slain but captured. Common practice of the medieval period was to officially ransom these prisoners for well-established prices. A common yeoman footman might ransom for 2 gp, a minor priest for 80 gp, a knight's squire for 200 gp, and a king's man for 500 gp. These are paid for by the lord of the prisoner. A player character (as a lord and master) is expected to do the same. Of course, the player character can pass much of this cost on to his own subjects and the relative of the prisoner. Thus men might languish for long periods in the hands of the enemy before their ransom was raised. Furthermore, should a player character ransom a hireling, follower, or henchman, he has every reason to expect loyal service from that man in the future. After all, he has demonstrated his willingness to save that NPC from hardship and death.
In a fantasy world, a player character is also expected to bear the cost of magical spells cast to the benefit of his men. He may arrange to have his men blessed before battle or healed after it. He shouldn't grumble about the expense, because the spells also make good tactical sense. The bless spell increases the success of his army in the field. Magical cures get his army back on its feet quicker. All these things can make him very successful while also making him popular with his hired men.
Finally, the player character is expected to make an effort to raise or restore slain henchmen. This is not a normal expectation of hirelings or followers (although it can happen in extreme cases). The effort should be honest and true. A player character shouldn't fool himself into thinking no one will notice if he doesn't do his utmost. The player character who returns from an adventure minus his henchman is automatically under a cloud of suspicion, despite his most vehement protests. A player character must take great care to maintain his reputation as a good and upright employer.