The Battle of Kings Mountain.

DescriptionThe Battle of Kings Mountain was a military engagement between Patriot and Loyalist militias in South Carolina during the Southern Campaign of the American Revolutionary War, resulting in a decisive victory for the Patriots

In other words revolutionary war

It must have the same slope as the given line, so

m = -A/B = -1/-2 = 1/2

So far, we have

y = mx + b = x/2 + b

Use the given point to find b.

4 = -2/2 + b = -1 + b

b = 5

y = x/2 + 5

Multiply through by 2.

2y = x + 10

Standard form:

x - 2y = -10