[commonsense]

I wouldn't label everthing as a split. Sometimes it's a joint decision to better serve both parties.

The oneness apostolic movement in my hometown dates to about 1920.

My grandmother was witnessed to by a neighbor in 1929 and she and her children began attending and in 1930 my dad was baptized and received the Holy Ghost.

In the mid to late 40's the black members of the congregation left to begin their own group and joined the PAW. To the best of my understanding it was not a "split".

There was a split in 1953 or 54. Since I was quite small I'm not a good source but as I recall from my mother ....the pastor was out of town alot preaching, often for his brother. The congregation was not happy about it.
At this time another minister came to town with a winning personality. He had a TV program (yes, mid 50's) and managed to attract a large portion of the UPC group. At least 1/2 left and joined this independent work...pastor was trinity.
After a couple years several of these returned to the "fold".

While I was in Bible School there was another smaller "split".

Since we're dealing with people, there will always be differences of opinion.