The summit was notable for inviting three new members, Hungary, Poland, and the Czech Republic to join the alliance.
Slovakia had held a referendum on NATO membership in May 1997, but turnout in the referendum failed to achieve the required 50% of eligible voters and government sabotage was blamed, which in turn was viewed as one of a string of undemocratic measures taken by Prime Minister Vladimír Mečiar.
[3] A main concern for the United States was the cost of potentially raising the military standards of the new Eastern European members.
Estimates put this cost at as much as US$10 billion, which participants worried could lead to the treaty recognizing the new members being rejected by the Republican-held U.S.
One notable absence from the summit was Boris Yeltsin, President of Russia, which was instead represented by lower level bureaucrats.