The sunni/shiite divide occurred over?

yes it ended over 1,400 years ago.

The sunnie and shiite divide occured because there was a debate about the rightful succession after the death of the prophet Muhammad. Basically there were multiple people who were "qualified" to take the place of Muhammad upon his death and it was between two people: one of which believed what the Sunni people believe and the other who believe what the Shiites believe.

Sorry if this doesn't make sense I know what I am trying to say it just isn't coming out quite how I want it to

a change of venue is the legal term for moving a trial to a new location. a change of venue request because venue is improper means that the removing defendant believes that the case may not be in that venue because it is improper under procedural rules.

c, they united with once