What did the first battle of bull run prove?

The First Battle of Bull Run was the first major battle of the Civil War. Although the Union forces outnumbered the Confederates, the experience of the Confederate soldiers proved the difference as the Confederates won the battle.

Explanation:

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.