Which term refers to american troops in europe during world war 1

Which statement describes domestic terrorism?

Match the following: 1. empirical the belief that an idea should be evaluated based on how it works 2. fundamentalism knowledge based on observation and experiment rather than theory 3. obtrusive to intentionally force ideas or intrude on others 4. pragmatism not religious or spiritual in nature 5. secular a religious doctrine that emphasizes a return to rigid principles

How can we stop u. s. military drone strikes from hurting innocent people