Return Engagement is the first book of Harry Turtledove's Settling Accounts trilogy of alternate history novels. It follows a Second World War waged on American soil between the United States and the Confederate States.

This trilogy is part of a larger series of novels. For convenience's sake, many Turtledove fans refer to this as Timeline-191, after Robert E. Lee's Special Order No. 191.

Following the return of the occupied states of Kentucky and Houston to the Confederacy in early 1941, President Jake Featherston breaks his solemn vow and remilitarizes them, essentially declaring war against the United States in act if not in word. US President Al Smith hurries to prepare for war, but his country is sent reeling by the Confederate attack into Ohio on June 22, 1941.

The Yankees under General Abner Dowling and Colonel Irving Morrell fight desperately but by 1942 the Confederate Army has reached the shores of Lake Erie and cut the country in two. Meanwhile, the Mormons in Utah have once again revolted, prompting a swift response from the US Army. A US counterattack in Virginia bogs down, and the Confederates are preparing a second offensive for the summer of 1942 when Al Smith is killed in a bombing raid on the capital city of Philadelphia. A shaken Charlie La Follette is sworn in as President of a nation fighting for its survival.