Scenario 1:
You were recently 'asked' to be in a inquisitors personal soldiers of course you accepted cause you can't say not to a inquisitor and now you and your inquisitor are sitting outside of your downed ball on a unknown Xenos world your inquisitor wounded and no seeable imperial forces on the planet it looked grim but in the distance you spotted something a valk? No..they were tau drop ships they were on a tau colony by the looks of it and now you are stuck with a mad inquisitor some tau about to knock on your doorstep..good luck
Scenario 2: -in the making-