This is another monument in Memory Grove Park.
The plaque on this one says:
DEDICATED BY THE LIVING
TO THE DEAD OF THE
145TH UNITED STATES
PRO DEO PRO PATRIA
For those who's Latin is a bit rusty the last line reads, "For God, For Country"
Here is some history of the unit: http://www.globalsecurity.org/military/agency/army/1-145fa.htm