As I said before, the German Union President of the Reform movement and his wife became good friends of ours after they joined our Church. We had actually lived and worked in the same area some years before, and both of us regretted that we had not become friends already then. Later he showed me some of the material he had been using against the Church while we were "neighbors". Later he discovered the material he had was not true. Now I am giving this only by memory, where some of the details could be faulty.
His wife's family were the original Reformers, SDA workers in Hannover, Germany. It happened during World War I (1914-1918) when the European Division President (Conradi) sent an order to all workers in Europe that if any pastor would discourage drafted Adventist from from fighting for the Emperor and carry the gun assigned to him, they were no longer workers in good and regular standing in the Adventist Church.
This portion I also heard from Dr. Walter, professor of Church History at Andrews. He was originally from Switzerland and he told us that as a young worker he had received this order from Conradi.
Back to Hannover where a youth leader disagreed with Conrady and helped hide a young man to prevent him from having to carry a gun in the war. For this reason he was fired on orders from Conradi, and with that he and some sympathizers formed the Reformed Church. It seems to me they had to go under ground for the rest of the war. We can agree now that the Reform Movement was, at that time, the true Church.
After the war, seems like it was 1920, men from the GC came to Germany to negotiate with the Reform people. According to docujments I have seen, and also acknowledged by my friend, the former Reformed President, and also a former Reformed member from USA, the GC people acknowledged the mistake Conradi had made. Conrady left our church and joined the Seventh-day Baptist Church (in Holland, as far as I remember). They apologized to the Reformed people and welcomed them beck into our fellowship.
Unfortunately the negotations did not succeed. These were the reasons I learned:
1) The reformers refused to accept the apology, because they felt the GC was at fault for what Conradi had done. They felt the GC should have been able to prevent him from making the mistales he did.
2) The reformers then maintained that the GC should not have permitted the SDA young people to response to the draft even if they could work as medical cadets, while the GC maintained this was in accordance with the agreement made between the Church and Abraham Lincoln.
The present Reformers seem to have added a few items which they use as reasons for still having their own movement apart from the main Church, but I will not attempt to get into that here.