People & Histories
January 1654

The Pereiaslav Agreement

Khmelnytsky's Cossack state accepts the protection of the Muscovite tsar, an alliance later read as Ukraine's "reunification" with Russia.

  • Pereiaslav Treaty of 1654 (Internet Encyclopedia of Ukraine) — Internet Encyclopedia of Ukraine (signed entries by subject specialists), Canadian Institute of Ukrainian Studies (2024)
  • Ukraine: A History (4th ed.) — Orest Subtelny, University of Toronto Press (2009)
  • The Gates of Europe: A History of Ukraine — Serhii Plokhy, Basic Books (2015)

Debated by historians empirestatehood

By 1653 Khmelnytsky’s Cossack state was in trouble. His Crimean Tatar allies had abandoned him in battle again, and the Ottomans could not be relied on against Poland. Since 1648 he had repeatedly asked the Orthodox tsar of Muscovy, Aleksei Mikhailovich, for help, and now he finally accepted the tsar’s protection.

In January 1654, at the town of Pereiaslav, the hetman and his council met the tsar’s envoys and accepted his protection. The detailed terms were settled in Moscow that spring.
  • Pereiaslav Treaty of 1654 (Internet Encyclopedia of Ukraine) — Internet Encyclopedia of Ukraine (signed entries by subject specialists), Canadian Institute of Ukrainian Studies (2024)
  • Ukraine: A History (4th ed.) — Orest Subtelny, University of Toronto Press (2009)
  • The Gates of Europe: A History of Ukraine — Serhii Plokhy, Basic Books (2015)

On paper the Hetmanate kept a great deal: an elected hetman, its own administration and army, and the rights of its social estates. But the original documents have not survived, and the surviving drafts are vague enough to support very different readings.

What followed is less disputed. After Khmelnytsky died in 1657, Muscovy used the agreement to justify ever greater interference, and Ukraine slid into decades of civil war and Muscovite, Polish and Ottoman intervention, a period remembered as “the Ruin”. It ended with Ukraine partitioned between Muscovy and Poland, while Podolia was under Ottoman rule from 1672 to 1699.

  • Pereiaslav Treaty of 1654 (Internet Encyclopedia of Ukraine) — Internet Encyclopedia of Ukraine (signed entries by subject specialists), Canadian Institute of Ukrainian Studies (2024)
  • Ukraine: A History (4th ed.) — Orest Subtelny, University of Toronto Press (2009)
  • A History of Ukraine: The Land and Its Peoples (2nd ed.) — Paul Robert Magocsi, University of Toronto Press (2010)
  • Hetman state (Internet Encyclopedia of Ukraine) — Internet Encyclopedia of Ukraine (signed entries by subject specialists), Canadian Institute of Ukrainian Studies (2024)
Over the next century the Hetmanate’s autonomy was whittled away, until Russia abolished the hetman’s office in 1764.

The meaning of 1654 has been argued over ever since. Most Ukrainian historians read it as a temporary military alliance or a protectorate.

  • Pereiaslav Treaty of 1654 (Internet Encyclopedia of Ukraine) — Internet Encyclopedia of Ukraine (signed entries by subject specialists), Canadian Institute of Ukrainian Studies (2024)
  • Ukraine: A History (4th ed.) — Orest Subtelny, University of Toronto Press (2009)
  • The Gates of Europe: A History of Ukraine — Serhii Plokhy, Basic Books (2015)
Russian imperial and Soviet historians called it the “reunification” of two fraternal peoples in one state, and the same reading appears in Russian state rhetoric today.

How it's seen
Ukrainian historians

A temporary military alliance or protectorate that Muscovy later used to strip Ukraine of its autonomy.

  • Pereiaslav Treaty of 1654 (Internet Encyclopedia of Ukraine) — Internet Encyclopedia of Ukraine (signed entries by subject specialists), Canadian Institute of Ukrainian Studies (2024)
  • Ukraine: A History (4th ed.) — Orest Subtelny, University of Toronto Press (2009)
  • The Gates of Europe: A History of Ukraine — Serhii Plokhy, Basic Books (2015)

Russian imperial, Soviet and current state view

The reunification of two fraternal peoples in a single state, freely chosen by the Cossacks.

Why it matters today

Ukraine

Pereiaslav is a textbook case of the same event meaning opposite things. Moscow celebrated it for centuries as a reunion of brothers. Many Ukrainians see it as the start of a long loss of self-rule, and are wary when it is invoked as proof that the two nations belong together.