Military success in early 1862 leads to substantive Federal presence in the lower Mississippi valley. By mid-1862, Federal forces hold Helena, Nashville, Memphis, and New Orleans. The Federal presence sparks large numbers of fugitive slaves to seek freedom, forcing Federal military officials to deal with the slavery issue. The lower Mississippi valley witnesses the first instance of extensive Federal territorial control and large numbers of fugitive slaves. It also experiences the first substantive efforts toward “Reconstruction,” though the failure of southern Unionists – in Louisiana especially – to seize the initiative influences Lincoln in issuing the preliminary Emancipation Proclamation. The emancipatory provisions of the 1862 Confiscation Act partly in response to developments in the lower Mississippi valley, but contrasting responses of slaves and slaveholders to the Federal presence in the region, also reveal the difficulties of implementing the act.