Well, depends on what battle this question is talking of.
I'm going to assume you're talking about the famed "Battle of Saratoga" and specifically the "Battle of Bemis Heights".
That specific battle cost that dude 600 soldiers.
If you're talking about "Freeman's Farm" then that cost him around 600 guys as well.
I did something super similar to this but I forgot
Great Britain and the British Empire except Scotland started in 1752 and they adopted the Gregorian calendar and 1952 also
To cause a source to be biased means that it is influenced by your opinion or another factor that is not factual. Bias can take away from the credibility because it is not completely true, as a source should be.