▁earliest ▁Roman ▁for ts ▁at ▁V ind ol anda ▁were ▁built ▁of ▁wood ▁and ▁tur f . ▁The ▁remains ▁are ▁now ▁buried ▁as ▁much ▁as ▁ ▁deep ▁in ▁the ▁an ox ic ▁water log ged ▁soil . ▁There ▁are ▁five ▁tim ber ▁for ts , ▁built ▁( and ▁demol ished ) ▁one ▁after ▁the ▁other . ▁The ▁first , ▁a ▁small ▁fort , ▁was ▁probably ▁built ▁by ▁the ▁ 1 st ▁C oh ort ▁of ▁T ung ri ans ▁about ▁ 8 5 ▁AD . ▁By ▁about ▁ 9 5 ▁AD ▁this ▁was ▁replaced ▁by ▁a ▁larger ▁wooden ▁fort ▁built ▁by ▁the ▁ 9 th ▁C oh ort ▁of ▁Bat av ians , ▁a ▁mixed ▁inf antry - c aval ry ▁unit ▁of ▁about ▁ 1 0 0 0 ▁men . ▁That ▁fort ▁was ▁rep a ired ▁in ▁about ▁ 1 0 0 ▁AD ▁under ▁the ▁command ▁of ▁the ▁Roman ▁pre fect ▁F la vi us ▁Cer ial is . ▁When ▁the ▁ 9 th ▁C oh ort ▁of ▁Bat av ians ▁left ▁in ▁ 1 0 5 ▁AD , ▁their ▁fort ▁was ▁demol ished . ▁The ▁ 1 st ▁C oh ort ▁of ▁T ung ri ans ▁returned ▁to ▁V ind ol anda , ▁built ▁a ▁larger ▁wooden ▁fort , ▁and ▁remained ▁here ▁until ▁Had rian ' s ▁Wall ▁was ▁built ▁around ▁ 1 2 2 ▁AD , ▁when ▁they ▁moved , ▁most ▁likely ▁to ▁Ver cov ici um ▁( H ous est ead s ▁Roman ▁Fort ). ▁ ▁Stone ▁for ts