Baldwin took advantage of the weakening of the Seljuqs ' power after Roger of Salerno 's victory in the Battle of Sarmin .
Baldwin decided to annex the small Armenian principalities in the valley of the Euphrates .
Taking advantage of the weakening of the Seljuqs ' power after Roger of Salerno 's victory in the Battle of Sarmin , Baldwin decided to annex the small Armenian principalities in the valley of the Euphrates .