He graduated from the United States Military Academy at West Point , New York , in 1850 , and was commissioned as a second lieutenant .
Slemmer was born in Montgomery County , Pennsylvania , and raised in Norristown .
Slemmer graduated from the United States Military Academy at West Point , New York , in 1850 , and was commissioned as a second lieutenant .
Slemmer was born in Montgomery County , Pennsylvania , and raised in Norristown .