 Complete the following phrase:  Allen returned to Pittsburgh in 1855 after three years out west. In July 1857 he married Elizabeth Robinson and together they raised five children. The outbreak of the Civil War found Allen constructing a railroad in todays West Virginia. He and his family were seized by Confederate forces and held captive until repatriated at Washington, D.C. He immediately offered his services to his friend, General McClellan, now commander of the Army of the Potomac. Circumstances instead took Allen to Virginias Shedoah Valley where he fought in the battles of Lewisburgh and 