10th Armored RcOver Trier AiteBy JAMES CANNON Staff CorrespondentWITH THE 10TH ARMORED DIV., Trier, Germany, March 2— The Porta Nigra arch, relic of ancient Roman architecture, crumbled by the centuries but unmarked by war, was in better shape than most of Tner, which fell today to this armored division.Considering the importance of Trier as a road, rail and ordnance center, the Nazis didn’t make much of a fight. But it was no pushover either for this division, which left many vehicles and some men on the approaches of the town.Attacking with five columns of infantry and tanks, the 10th Armored reached the outskirts of Trier yesterday at noon. Twenty-four hours later Capt. Robert Wilson of Newark, N. J., raised in the centerIT