You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Estonia

Context:
At the end of the 1980s, Estonians perceived their demographic change as a national catastrophe. This was a result of the migration policies essential to the Soviet Nationalisation Programme aiming to russify Estonia – administrative and military immigration of non-Estonians from the USSR coupled with the deportation of Estonians to the USSR. In the decade following the reconstitution of independence, large-scale emigration by ethnic Russians and the removal of the Russian military bases in 1994 caused the proportion of ethnic Estonians in Estonia to increase from 61% to 69% in 2006.

Question:
What Russian institutions were removed in the decade following Estonia's reclaim of independence?

Russian military bases