He wrote about this on his page on Twitter.

“I am very glad to start a dialogue with my Polish, Ukrainian and Belarusian partners in Warsaw. We share common concerns regarding regional stability and intend to strengthen the sovereignty and security of our countries, ”he said.

Very pleased to start a conversation among my Polish, Ukrainian, and Belarusian counterparts in Warsaw today. We share common concerns over regional stability and are committed to strengthening the sovereignty and security of our nations. pic.twitter.com/CW97ZtETmc

- John Bolton (@AmbJohnBolton) 31 באוגוסט 2019

Earlier, Bolton said that the United States intends to cooperate more closely with Ukraine and Moldova in the military sphere.