Answer: but & thus
Explanation: thus: as a result or consequence of this; therefore
but: used to introduce a phrase or clause contrasting with what has already been mentioned
When you state or set something forth in words, you have expressed yourself.
I don't really know that much about history but I will try my best to help you
Nations responded to threats to their allies by mobilizing their militaries.
By the time that anyone took back the decision to go to war, it was already too late because militaries got ready so quickly. It was like lighting a fuse, it happens so fast, it is almost impossible to stop.