What are some inventions or ideas that to advance trade?

Name two fighter jets that were used by each side during the battle of the coral sea its for a project, this is due today

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

Which major change took place in nigeria in 1999?