infantryn.步兵；步兵部队infantry rifle company步兵连Infantry Mortar Program步兵迫击炮计划Infantry and cavalry.步兵骑兵都有。Infantry Combat Vehicle步兵战车Infantry Bridge Workshop步兵旅架桥组Infantry Officers Course步兵军官教程Infantry Section Carrier步兵小队运载工具Infantry Rifle Unit Study步兵步枪小队研究(美国)Infantry Division Forward步兵师前沿infantry fighting vehicle步兵战斗车