Battery M was held in reserve at the beginning of the Seven Days Battles (June 25–July 1, 1862), stationed south of the Chickahominy River at Camp Lincoln near Savage's Station following previous detached service with Brigadier General Fitz John Porter's V Corps. The battery remained in camp during the battles of &lt;a href="Battle%20of%20Beaver%20Dam%20Creek"&gt;Beaver Dam Creek/Mechanicsville&lt;/a&gt; and Gaines' Mill, and was then deployed to cover the approaches of a bridge over the Chickahominy on June 28 during the V Corps' retreat south of the river; on June 29, the battery moved through the White Oak Swamp and was detailed to an advanced night reconnaissance with Colonel William Averell's 3rd Pennsylvania Cavalry beyond the Glendale crossroad, accompanying Brigadier General George A. McCall's Third Division, V Corps toward Malvern Hill, into the early morning of June 30; the battery moved on to Malvern Hill prior to the Battle of Glendale, but was hotly engaged the following day with the rest of the Horse Artillery Brigade during the Battle of Malvern Hill on July 1.