US Presidency
1898

Under date of April 19 district officers were directed to take all preliminary measures short of the actual attaching of the loaded mines to the cables, and on April 22 telegraphic orders were issued to place the loaded mines in position. The aggregate number of mines placed was 1,535, at the principal harbors from Maine to California. Preparations were also made for the planting of mines at certain other harbors, but owing to the early destruction of the Spanish fleet these mines were not placed. The Signal Corps was promptly organized, and performed service of the most difficult and important character. Its operations during the war covered the electrical connection of all coast fortifications, the establishment of telephonic and telegraphic facilities for the camps at Manila, Santiago, and in Puerto Rico. There were constructed 300 miles of line at ten great camps, thus facilitating military movements from those points in a manner heretofore unknown in military administration. Field telegraph lines were established and maintained under the enemy's fire at Manila, and later the Manila-Hongkong cable was reopened.