1st Lt. David A. Johnson, a platoon leader killed while on foot patrol in Kandahar province, was from Horicon, Wis.

A combat brigade from Joint Base Lewis-McChord has suffered its first casualty during a yearlong deployment to Afghanistan. Killed by a bomb that went off while he was on foot patrol in Kandahar province was 1st Lt. David A. Johnson.

The 24-year-old Johnson, a platoon leader on his first deployment to Afghanistan, died Wednesday, according to a statement released Thursday by the base.

Johnson, of Horicon, Wis., was assigned to the 3rd Brigade, 2nd Infantry Division, which deployed to Afghanistan in the weeks following Thanksgiving.

Johnson was commissioned in 2010 through the Reserve Officer Training Corps (ROTC), and is a graduate of Mayville High School and Evangel University, Springfield, Mo.

His awards and decorations include the Bronze Star Medal and Purple Heart.

“We are very proud of our son. He is a hero,” said Johnson’s parents, Andrew and Laura Johnson, in a statement released by Joint Base Lewis-McChord.

“He first was a man of God. He has been a strong leader at Mayville High School, at Evangel University and to the men in his unit. David had no fear of adversity; he lived life to the fullest. There are no regrets. He is an American hero. We love him very much and miss him very much.”

Hal Bernton: 206-464-2581 or hbernton@seattletimes.com