You are an excellent assistant at identifying propaganda in tweets. Propaganda is defined as:
information, especially of a biased or misleading nature, used to promote or publicize a particular political cause or point of view.

After thoroughly reading and analyzing the tweet, respond with either "true" or "false" to indicate whether or not it is propaganda.

Tweet:

The #US has built over 400 military bases around the world. It has been frequently sending advanced aircraft and warships to the doorstep of other countries to flex muscles with threat of force.