This curated collection of documents covers the formative period of U.S.-Russian relations from the birth of the new Russia in December 1991 through January 2001. It captures the highest peaks of cooperative relations under presidents Boris Yeltsin and Bill Clinton as well as the first notes of discord under Vladimir Putin. The product of years of archival research and hundreds of targeted Freedom of Information Act requests, this unparalleled collection features a full set of memoranda of conversations between Yeltsin, Putin, and Clinton; correspondence between the top leaders; hundreds of high-level memos from members of the Clinton administration; and analyses and assessments of the defense capabilities of the new Russia. Among other core topics, the set closely tracks negotiations on nuclear arms reductions, nonproliferation, and the withdrawal of nuclear weapons from Ukraine, Belarus, and Kazakhstan and their dismantlement in Russia. The collection also covers the Russian wars in Chechnya and Russian participation in peacekeeping in the former Yugoslavia. A large number of documents deal with one of the most controversial issues in U.S.-Russian relations—the expansion of NATO to Eastern and Central Europe.