A new military school was created called "Yeonmu Gongwon", and an officers training program began. However, despite armies becoming more and more on par with the Chinese and the Japanese, the idea of a navy was neglected. As a result, it became one of the few failures of the modernization project. Due to the neglect of developing naval defence, Joseon's long sea borders were open to invasion. It was an ironic mistake since nearly 300 years earlier, Joseon's navy was the strongest in all of East Asia. Now, the Korean navy was nothing but ancient ships that could barely defend themselves from the advanced ships of modern navies.