/f, /fac, and /faction: Opens the faction gui. If you don't have a faction, lets you create one from the gui
/plot claim: Claims an apartment plot if standing in one
/plot: Opens the plot menu
/contracts: opens the contracts menu, where you can make contracts across 6 types.
/f war: opens the war menu
/f war (faction) declare (type): Declares a war of a type on a faction.
Conquest wars: Annexes the entire losing faction
Looting wars: Only takes the losing faction's money and assets

Roles menu: Lets you set roles of faction members, when clicking on their playerhead. Also lets you invite people
Bank menu: Lets you deposit stuff to the faction, and withdraw from the faction. and make loans. and repay loans. Bank plots do this more efficiently.
Faction home: Shift click the enderpearl in the faction menu to set, click it normally to tp to it.