The Union's strategy regarding Fort Sumter after its capture was primarily Isolation.

Following the capture of Fort Sumter, the Union implemented a strategy of isolation as a key component of the Anaconda Plan. This tactic centered on blockading Southern ports to sever the flow of supplies and resources, thereby suffocating the Confederacy's economy and military efforts. The objective was to undermine the South without launching immediate large-scale invasions, enabling Union forces to dominate vital supply routes and limit Confederate access to essential materials. By isolating the Confederacy, the Union sought to weaken its capacity to continue the war, ultimately gaining a strategic edge in the long term during the Civil War.