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.
The campaign that brought the Union and Confederate armies to Chickamauga began in late June 1863, when the Union Army of the Cumberland, under Maj. Gen. William S. Rosecrans, advanced southwestward from Murfreesboro, Tennessee, against the Confederate Army of Tennessee, commanded by Gen. Braxton Bragg.y Sept. 17, two of Rosecrans' corps were reunited and were moving north toward Lee and Gordon's Mill on Chickamauga Creek to join the third Union corps. Bragg believed the Union troops at Lee and Gordon's Mill constituted the northernmost elements of Rosecrans' force.