DTaP[edit] DTaP (also DTPa and TDaP) is a combined vaccine against diphtheria, tetanus, and pertussis, in which the component with lower case 'a' is acellular. This is in contrast to whole-cell, inactivated DTP (aka DTwP). The acellular vaccine uses selected antigens of the pertussis pathogen to induce immunity.
The Battle of Pea Ridge was fought March 7-8, 1862, and was an early engagement of the American Civil War (1861-1865). Armies & Commanders: Battle of Pea Ridge - Background: In the wake of the disaster at Wilson's Creek in August 1861, Union forces in Missouri were reorganized into the Army of the Southwest. Numbering around 10,500, this command was given to Brigadier General Samuel R. Curtis with orders to push the Confederates out of the state.
In May of 1863, the Confederate army, led by General Robert E. Lee, gained victory at the Battle of Chancellorsville, Virginia, defeating a much larger Union army.This gave the Confederate army confidence to continue their advance northward.he change in Union leadership in late June had caused the Confederates to lose track of the Union army as Meade deviated from Hooker's plan to interrupt Lee's lines of communication and instead led Union forces north to use his army as a barrier between Lee and the cities of Washington and Baltimore.