Refer to the passage below and then answer the question afterwards in the same language as the passage:

Passage: At this point, the crisis was ostensibly at a stalemate. The Soviets had shown no indication that they would back down and had made several comments to the contrary. The US had no reason to believe otherwise and was in the early stages of preparing for an invasion, along with a nuclear strike on the Soviet Union if it responded militarily, which was assumed.

Question: How much reason did the US have to believe?
no reason