On May 8, 1864, McPherson's 15th and 16th Corps [US] seized Snake Creek Gap. On the 9th, attempting to destroy the R. R. at Resaca, defended by Cantey's Div. of Polk’s Corps [CS], McPherson was forced to withdraw to the mouth of the gap where he intrenched. This was the beginning of Sherman's [US] move to outflank Johnston's forces [CS] at Dalton. May 13 ~ 14, Sherman moved the 14th, 20th, and 23d Corps [US] through the gap and together with McPherson's troops, advanced toward Resaca, the 4th Corps [US] marching due S. from Dalton. On the 14th began the two-day battle of Resaca.