This is intended as begining source of referrance, for those who may not be entirely familliar with the games features.

Battle logs tell you about units honor and performance.
Custom battles lets you test, and design armies.
The smaller flags on units tells you their honor.
The zen coins on unit icons shows their fatigue status.
Your general is the first unit you buy.
General gives nearby units morale bonus, unless routing.
General dying subtracts morale, so more from nearby units.
Archers can cause freindly fire, guns dont.
Archers in 3rd or more ranks take an accuracy penalty.
Guns in 3 ranks rotate and fire one rank at a time.
Guns in 2 ranks fire both ranks at once.
Hold Position keeps missile units from being lured forward.
Hold fire lets you conserve ammo, and target your archers.
Hold Alt then clik target to make missile units melee attack.
Missiles start in skirmish formation, so wont stand ground.
Hold Formation raises Ashi's morale, improves them vs. cavalry.
Units in Loose Formation lose morale and effectiveness.
Units in Wedge Formation get melee attack bonus.
Units fighting against a Wedge get the same attack bonus.
Yari armed units get attack bonus against cavalry.
All units get attack bonus against cavalry in woods.
Units attacking an enemys flank get an attack bonus.
Units attacking an enemys rear get a larger attack bonus.
Units with friends on either flank gain a morale bonus.
Units with enemy in their rear lose morale.
Units with nearby routing enemy gains morale.
Units with nearby routing friends loses morale with each unit.
Hold Alt then clik ground to keep units facing unchanged.
Select unit, hold Ctrl, then select another unit to select both.
Hold Ctrl-Shift-(1 thru 9) to hotkey selected units.
Recall hotkeyed 'Division' with Ctrl-(1 thru 9).
'Stacked' movement orders when withdrawing from the enemy is one of the main causes of the 'Rout-Bug'.