Complex sentence: During his career, he rose to the rank of Lieutenant Colonel and was the first African American to be appointed to the Medford City Planning Board and to have a public park named after him, "Dugger Park".
Split into simpler sentences: During his career, he rose to the rank of Lieutenant Colonel. Dugger was the first African American to be appointed to the Medford City Planning Board and to have a public park named after him, "Dugger Park".