In the 14th Century a quarrel over English succession to the French throne escalated into what history would call the Hundred Years' War. The ongoing war exhausted the standing armies of both sides and dependency on mercenary soldiers grew.This game from Koei borrows heavily from the Dynasty Warriors series which like the title implies, is loosely based on the Hundred Years War. However, although you control one warrior, this game is more squad based, meaning you control a small group of soldiers, and while you can run around by yourself, it's not a good idea.
This Game contains examples of:
Action Girl: There are a few female characters who fight for both England or France, the female rapier units, and yourself if you choose a female mercenary character.
All Your Base Are Belong to Us: Can be invoked by both sides. If the commander of the town is taken down, the town immediately falls under control of the other side. Great if it's your side that captured it, bad if the enemy forces captured one of your towns.
Alternate History: While the game loosely follows events in Real Life, things can change. For instance, one mission has you save Joan of Arc when she's imprisoned.
Anachronism Stew: The game contains a lot of characters who never would have met in real life. For example, Edward the Black died long before Joan of Arc came around, but you may run into both of them in one map.
Exotic units are also present which probably weren't present in 14th/15th Century France, such as elephant units, camel riders, and Asian units such as South China spearmen.
Annoying Arrows: Archer units, although usually more annoying when controlled by the player, as the computer controlled ones don't fire as often as a player can.
Authority Equals Ass Kicking: Pretty much every named character you encounter on the battlefield. Some are tougher than others though, and will largely depend on if you're facing them with units that they're weak against.
Bad Ass Crew: You can be one if you're controlling a unit of soldiers who are strong against the current enemy forces you're currently fighting against. However, they can quickly turn into a Red Shirt Army if you encounter troops you're weak against.
BFG: Some siege units for breaking down castle doors are large cannons. You can actually control them if you want, but they're not very good against mobile opponents.
Boring, but Practical: Cavalry units, particularly horses, are probably the most efficient troops to use on the battlefield due to the fact that they're strong against a lot of unit types, and more importantly, can run away quickly if you find yourself on the losing end. Just try not to run into any pikemen while they have their pikes down.
Color-Coded for Your Convenience: English units are always red, while French units are always blue no matter which side you're on. Do not mix this up or you'll find yourself wondering why you can't hurt the English soldiers when fighting for England while the blue French units are killing your guys left and right.
Crippling Overspecialization: The pikemen are the most blatant example of this trope. They are only good against cavalry, but get destroyed by almost every other unit. They also have an extremely limited attack options, which is to lay down their long spears in front of them, and a quick stabbing attack which has a long Cool Down.
That said, however, they are extremely useful when you run into enemy Hero Units who are usually (but not always) on horseback.
Curb-Stomp Battle: Can usually happen when you're controlling mounted units such as cavalry, who are strong against most foot soldiers. But also played straight if you run into mobs of units who are weak against your current squad's weapons. However, they can utilize this trope against you as well...
Easy Communication: Like in Dynasty Warriors, you can always see where units are, and where enemy and friendly generals are located. In addition, when you take over a town, you'll get congratulated by a friendly general even if they are on the other side of the map. Also, when generals are defeated, they will say something to you before they leave the battlefield for a few minutes, particularly if you defeated them.
Easy Logistics: You never have to worry about feeding your troops, and for troops that have an ammo supply, if you run low while out in the field and can't make it back to a friendly town to refill, you can simply un-control them for a few moments, and then when you take control of them again, they'll have magically restored some of their ammo on their own.
<Hero> Must Survive: While your soldiers can be sent off to die without you, if your character is defeated in battle, the mission ends immediately, and your only reward is whatever pitiful items you managed to grab before being defeated. You are also sent back to the tavern.
Hit-and-Run Tactics: Main use of cavalry units, who has a charge attack, an attack to let them get out of being surrounded, and a defensive ability. One English campaign also falls into this trope, where your objective is to take over several towns near each other (although you can take your time if you want to take over other towns first)
Instant-Win Condition: When the town's enemy commander appears, if you can defeat him, every other enemy unit in the town will disperse and flee, and the town immediately falls under your faction's control.
Likewise, if you have a mission to accomplish, such as "take these 3 towns", the battle will end as soon as you capture the last objective.
Perfectly justified: That condition is the one on your mercenary contract. Would would you risk your life for a second longer than what you were paid for?
Invincibility Power-Up: When you activate "Bladestorm" mode (via a full morale bar, gained largely from killing enemies, but can also be acquired by touching deer or an enemy dropping a wine bottle, and fills gradually when your health bar gets low), where your character/squad is immune from damage, and can attack/move around much faster. However, keep in mind that enemy generals can also activate this ability, and on harder missions will do so with impunity.
Leeroy Jenkins: Joan of Arc does one in one mission, and the player can invoke this as well if they rush towards an enemy stronghold or large group of enemy troops before their backup can get there.
Kinetic Weapons Are Just Better: You can get guns in this game, and they are extremely powerful with only a few weaknesses, but they have a lot of pre-requisite quests, and you won't acquire them all until late in the game. But someone siding largely with the French units will run into said missions sooner than someone siding mostly with the English.
No Arc in Archery: Largely played straight. They do arc if you fire from an extremely long distance, but most fights take place up close so you may not notice it. Averted with one ability longbowmen receive, where their shots do arc and can be fired from a much farther distance than a regular straight shot.
One-Man Army: Can be played straight, but usually not recommended due to the game's emphasis on squad and army battles consisting of large groups of people fighting. You can get quickly overwhelmed if you try to take on 50 guys by yourself. However, you do move faster on your own (second only to mounted units), so if you're in a losing fight, you can run away much quicker by releasing control of your current unit. But if a mounted unit is chasing you, you can't outrun them and they're hard to outmaneuver due to most fights taking place in open fields.
Private Military Contractors: You are essentially a medieval equivalent of one. The game mentions the heavy use of mercenaries on both sides, and you can change sides freely with no repercussions whatsoever. So you could theoretically take over one town for the English in one mission, then the very next mission requires you to take back that town for the French.
Standard Status Effects: There are a couple in the game, such as being on fire draining health, but like most other games, they're not practical in most areas, so you're still better off just killing everything as fast as you can.
Tactical Rock-Paper-Scissors: There are a variety of units in the game that you can control, and each has their own strengths and weaknesses against various other troops. For example, swordsmen are strong against rapier users, but they get defeated easily by halberds, who in turn get destroyed by the rapier units.
Take Your Time: While many missions are limited in scope (usually 3-6 days, which each day lasting about 10 minutes or so), story missions have an "indefinite" time period, meaning you can conquer the entire map for your side before doing the actual mission if you wanted to.
Took A Level In Bad Ass: Played straight with Joan of Arc. When you first meet her, she's just a peasant girl on foot without much combat abilities who gets defeated easily. Later on, she's wearing plate armor and riding on a horse leading an elite unit of cavalry.
Can also apply to the player as well, who's fairly weak as well in the beginning, but as they gain experience and knowledge of the various types of troops and their strengths/weaknesses, can quickly learn to adapt to changing situations.