Wikipedia:Selected anniversaries/June 4
June 4: Independence Day in Tonga (1970)
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- 1615 - Forces under the shogun Tokugawa Ieyasu took Osaka Castle in Japan.
- 1792 - Captain George Vancouver claimed Puget Sound for Great Britain.
- 1920 - The Kingdom of Hungary was split into five countries with the signing of the Treaty of Trianon in Paris.
- 1942 - The Battle of Midway began with a massive Imperial Japanese strike on Midway Atoll.
- 1989 - PRC military units cracked down on the Tiananmen Square protests in Beijing.