What are the consequences of sending time travelers back from the future to this time?✶ What countries will be doing this?
It pulls future events closer (hastens the future), to name but one result. This happened today in fact.† It's one of the reasons I've had such a hard time predicting the timing of future events. America has sent time travelers back, as has China. I would imagine Russia would too, but I'm not sure (I haven't actually seen Russia do so prophetically).
✶See: Prevent Infiltration From the Future
†Yesterday; March 14, 2022