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| 1909, Feb. 21 |
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| Visit of Ferdinand to St. Petersburg, where he was received with royal honors. | 1 |
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| April 19 |
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| Convention with the Ottoman Empire, which recognized Bulgarian independence. The Ottomans made an agreement with Russia, which assumed responsibility for the financial settlement. | 2 |
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| Nov |
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| Draft treaty of alliance between Russia and Bulgaria. Ferdinand avoided committing himself, preferring to balance between Russia and Austria. Efforts of the Serbs to effect an alliance were evaded because of Ferdinand's unwillingness to abandon claim to all of Macedonia. | 3 |
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