Complex sentence: This extensive importation lasted until 1893, when the US experienced a financial panic, resulting in almost no Percheron importations between 1894 and 1898 and the loss of many existing horses as people were too poor to purchase or take care of large draft horses.
Split into simpler sentences: This extensive importation lasted until 1893, when the US experienced a financial panic, and virtually no Percheron imports occurred between 1894 and 1898. In addition many existing horses were lost as people were too poor to purchase or care for large draft horses.