Apparently, the US and Ukraine signed an agreement in 2021 for Ukraine to join NATO.
"On Nov. 10, the U.S. and Ukraine signed a Charter on Strategic Partnership, which asserted America’s support for Kyiv’s right to pursue membership in the North Atlantic Treaty Organization."
"On Nov. 10, the U.S. and Ukraine signed a Charter on Strategic Partnership, which asserted America’s support for Kyiv’s right to pursue membership in the North Atlantic Treaty Organization."
Opinion | The Two Blunders That Caused the Ukraine War
Robert Service, a leading historian of Russia, says Moscow will win the war but will lose the peace and fail to subjugate Ukraine. How Putin could be deposed.
www.wsj.com