The Netherlands became the first country in the world to allow same-sex marriage.
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Shenzhen became the first Chinese city to ban eating cats and dogs.
The Nagorno-Karabakh conflict between Armenia and Azerbaijan began.
The Royal Canadian Air Force was formed out of the Canadian Air Force.
Great Britain claimed The Straits Settlements as crown colonies: Singapore, Penang, and Malacca.
The Bolivian city of Potosí was founded after vast deposits of silver were discovered in the mountains nearby.
