railroad signals — Signals given in the operation of railroad trains by way of bell, whistle, lights, etc., especially at railroad crossings. 44 Am J1st RR § 385. Hand or light signals given by trainmen and switchmen to one another for the purpose of directing the… … Ballentine's law dictionary
Railroad electrification in the United States — comprised many different systems in many different geographical areas, few of which were connected. Despite this, there were a small number of common reasons for electrification.Streetcars and interurban systems are not within the scope of this… … Wikipedia
Operation Frantic — Part of Strategic bombing during World War II … Wikipedia
Operation Cooney — Part of Normandy Landings Date 8–10 June 1944 Location Brittany, France Result … Wikipedia
Operation Barbarossa — Part of the Eastern Front of World War II … Wikipedia
Operation Weserübung — Part of the Norwegian Campaign of the Second World War German forces advancing near Bag … Wikipedia
Operation Rolling Thunder — Part of the Vietnam War F 105 Thunderchiefs radar bombing at direction of a B 6 … Wikipedia
Operation Linebacker — Part of Vietnam War Date 9 May – 23 October 1972 Location Democratic Republic of Vietnam Result … Wikipedia
Operation Chahar — Part of Second Sino Japanese War Date August 1937 Location V … Wikipedia
Railroad chronometer — Railroad chronometers (railroader s watches) are specialized timepieces that once were crucial for safe and correct operation of trains in the United States and Canada. A system called Timetable and Train Order, which relied on highly accurate… … Wikipedia