Asynchronous communication is one of the type of telecommunication in which the transmission of message or information are take place from source to its destination without using any external clock signalling process.
In an asynchronous communication, the data or information are get transmitted in the form of one byte and this type of communication is using the asynchronous time for the transmission of data from one place to the destination.
Because the allied powers were a team that were not about to break apart and the axis powers would have kept attacking them if only on of the allied powers made peace.