The Ukrainian president not too long ago mentioned that the US would make ceding territory within the east of the nation a situation for its safety. The US Secretary of State now vehemently denies this.
https://www.spiegel.de/ausland/ukraine-krieg-rubio-wirft-selenskyj-luegen-ueber-sicherheitsabkommen-vor-a-ccc61779-7436-4afb-8ddb-dea4ef31846f#ref=rss