This page explains how Robert N. Burke (USATT# 4568)'s rating went from 1920 to 1931 at the 1999 Spring CO Civil War Close held on - 1 May 1999. The links below take you to pages that describe various aspects of the rating processor.

The rating processor goes through 4 passes in order. The links take you to pages that provide detailed explanations of the calculations during each of the 4 passes.