To The Last, Adam Lewis LaValley [best free ebook reader for android TXT] 📗

An amassment of projectiles soaring up the face of a ridge, 200 Union men face desperate odds: an assault by thousands of Confederate veterans. There is no escape.

Footnotes from further research are added at the end.

After reading this, I would highly suggest watching the 6-minute video about the charge on my homepage to get a better idea about it: Gettysburg - Chamberlain's Charge (DVD-rip)