Talk:The Man in The Wall/@comment-2601:85:8201:7EB2:B12C:EF67:D784:9AD5-20180626045944/@comment-2607:FEA8:91DF:E781:795C:16F7:DAEA:D152-20180710171823

The Tenno probably decapitated the leadership of the Empire, hence why a few hundred were enough to do the job. I think it's already been stated (though I can't find the source, so don't quote me) taht The Lotus successfully convinced them to turn. As we now know, the Orokin were pretty horrible, so it probably didn't take much convincing.

As far as the Stalker and other low-servants controlling warframes goes, he can't. With the lore behind Excalibur Umbra out, I think it's safe to say that the Stalker is the same. He's a warframe that's retained his sentience.