Dynasty Warriors 7

This achievement requires that you make every officer in the game (all 62) a sworn ally. This achievement is cumulative between characters, so if you get 15 sworn allies with Lian Shi, then switch to Zhen Ji, you'll still have 15 sworn allies.

In order to get an officer to be a sworn ally, you'll need to get their bond level to about 1/3ish of the bar. You can check their bond level by pressing start when you are playing conquest mode, selecting officer info, and then bonds. You can also check how many sworn allies you have total by pressing start and selecting stats.

Officer randomly show up in town, and if you have high enough bond level with them, they will become a sworn ally. In order for them to show up in town, you have to finish at least one of their legendary battles, which are the tiles with a face on them. You can highlight a legendary battle tile and see which character it belongs to. Each character has one tile.

I've seen one or two officers in town before I finished a legendary battle with them, so there may be other ways to get them to show up, but the vast majority of them didn't show up for me until I did their legendary battles. Maybe playing them in story mode, or something.

In order to raise your bond level with someone, you can either talk to them in town, or help them out on the battlefield. This will generally take the form of a rescue mission, where they are under attack from an officer and saving them gives you a bond boost. I think base defense missions also give a bond boost.

The first note is that you do not have to max out your bond with all allies, you just have to make them your sworn allies(which is about 2 bars on the friendship meter).

Now for preparation, all you really need is to have both your weapons with the congeniality skill equipped.

By the end of conquest mode you should have alot of sworn allies through natural progression of the game. But at the end you probably have a handful of warriors that are not your ally.

The best way I found to get them as allies is to replay the Alliance battles. Why? Because everyone shows up in at least one mission and after you play the battle it gets people to show up in the cities.

The best way to find the specific guy/girl you are looking for is to check the battle map during the alliance battle(hit select). If the warrior you are looking for is there, then there is a very high chance that he/she will show up in a city after the battle. It doesn't matter if the warrior is a friend or an enemy as long as your weapons have the congeniality skill. This is how I got my last 5 guys.

I hope this helps everyone.

an easy solution would be to play 2 of each officer's legendary battles in conquest mode, (it'd probably help to have all the cities open), i did this and it only took a few hours. be sure to visit the officer in the city after completing each battle in the legendary battle hexagon

example: select Ma Chao's legendary battle > select first mission > select difficulty (i went with normal because you get more money and fame points and its not to hard and not to easy) > complete the battle > recieve fame and money > read pop-up of Ma Chao visiting cities > go to city and talk with Chao > bond grows stronger

for second battle example: you wont get a pop-up that they are visiting cities after completing the second battle and you may unlock a wallpaper if the legendary battle had only two battles in the hex, go to a city with a yellow flag and if it has ma chao, talk to him and it will say Ma Chao is available as a sworn ally, leave city and you will get a wallpaper, eventually you will have em all and *PING* achievement unlocked

now for the officers that have 3 legendary battles you only have to do 2 of the 3 battles, talking to them in the city their in after each battle of course, but you can go ahead and do all three if you like to work your way towards the "Ultimate Conqueror" achievement, it will just tak longer to get this achievement though.

another thing i did was instead of fighting every officer and peon in the map just rushed to the end of the batte where the last officer is and killed him making my time for this achievement shortened, but you wont get as many skill points doing this and you may have to fight some officers to open gates in the battle.

ACHIEVEMENTS YOU CAN WORK ON WHILE DOING THIS ONE:
Ultimate Conqueror
Wandering Fighter
Renowned Warrior
Hero of the Ages
God of War
Nobleman
Historian
Wallpaper Collector

hope this helps