The Pacific War actually began in the 1930s when Japan invaded Manchuria and China well before the German invasion of Poland. The problem is, that the war remained localized between China and Japan, so no one recognized the Japanese aggression as the beginning of WW2, although it was clear that they were headed in that direction.
A router is a networking device that forwards data packets between computer networks. Routers perform the traffic directing functions on the Internet. A data packet is typically forwarded from one router to another router through the networks that constitute the internetwork until it reaches its destination node. A router is connected to two or more data lines from different networks. When a data packet comes in on one of the lines, the router reads the address information in the packet to determine the ultimate destination.
Routers are small electronic devices that join multiple computer networks together via either wired or wireless connections. In technical terms, a router is a Layer 3 network gateway device, meaning that it connects two or more networks and that the router operates at the network layer of the OSI model. Routers contain a processor (CPU), several kinds of digital memory,and input-output (I/O) interfaces.