Answer:While most African Americans serving at the beginning of WWII were assigned to non-combat units and relegated to service duties, such as supply, maintenance, and transportation, their work behind front lines was equally vital to the war effort.
Explanation:
Promotion could have multiple meanings.
For example, if you say "Mr. Knight got promoted (or got a promotion) from supervisor to manager". There promotion means "raise".
If a product is at promotion there promotion means advertising efforts.
It could also refer to a way to support a cause. For example: There's a campaing supporting healthy lifestyle promotion.
nullification rather than support secession
<span>It was Walter Raleigh who got permission from Elizabeth I to establish a colony in North America. It should be noted however that this colony ultimately failed, and it wasn't until Jamestown that a viable colony existed.</span>