Hjalmar Erickson born Tonsberg, immigrated to US

Hi, I am searching for any information relating to Hjalmar Erickson originally from Tonsberg, Norway. Born about 1873, he immigrated to the US in 1988 (age 15?) and joined the US Army. He served in the Spanish American War and the First World War. He married Adriana ?, born in Cuba in 1888. Any information would be appreciated. Thanks, Karina Boulle