During 1830's American leaders were afraid that Hawaii would fall in hands of a European power when Britain and France both forced Hawaii to accept treaties. Alarmed by this american leaders signed Treaty of Friendship with Hawaii in 1849. Soon Hawaii became a provisioning spot for American whaling ships and sugar plantation. The Hawaiian economy became more integrated when the two signed 1875 trade exchange treaty and the white Americans began to dominate Hawaiin economy and politics. But when the Us government introduced McKinley Tariff, it raised the import rates on foreign sugar. Most of the sugar planters knew that if Hawaii is annexed by US the the tariff issue would vanish. The planters staged an uprising and force that Queen to abdicate. It was formally annexed when the war broke out with Spain and the islands became significant for the US navy. A joint resolution was signed by president William McKinley.
The mesosaur fossils found on the South American and African continents are explained most easily if the mesosaur swam from one continent to the other.
A main reason that the age of revolutions initially failed to achieve widespread change in some nations of Europe was because many of these failed revolutions took place in the "backyards" of their mother countries--meaning that they were easily taken down with military power.
