User blog comment:Damac1214/Black Ops 2 Uprising DLC Trailer Released + Double XP on April 12th to April 15th/@comment-94.249.108.56-20130405100835/@comment-1263839-20130407094852

No because according to the Call of the Dead radios, Richtofen hadn't "dealt" with Samantha/Maxis yet, and the CotD radios are set on September 13th 1945, and Verruckt is set on September 10th 1945.

So Sam took control sometime between September 13th-the end of 1945.