I believe its RADAR.
They had airplanes in world war 1.
Same with machine guns.
And the first repeating rifle was made in 1860.
Which leaves the Radar.
-Steel jelly
Peter deeply cares for other people and therefore cares for the love that everybody around him deserves to have even if he is hurting.
Gettysburg<span> was the first major defeat suffered by Lee. It repelled his second invasion of the North and inflicted serious casualties on the Army of Northern Virginia. ... European investors gave the Confederacy approximately a 42 percent chance of victory prior to the battle of </span>Gettysburg/Vicksburg<span>.</span>
D i think because i know it is right