Here is Tim Walz on CSPAN back in 2007 on his military service:

“𝐈 𝐬𝐩𝐞𝐧𝐭 𝟐𝟒 𝐲𝐞𝐚𝐫𝐬 𝐢𝐧 𝐭𝐡𝐞 𝐍𝐚𝐭𝐢𝐨𝐧𝐚𝐥 𝐆𝐮𝐚𝐫𝐝, 𝐬𝐨𝐦𝐞 𝐨𝐟 𝐭𝐡𝐚𝐭 𝐟𝐮𝐥𝐥-𝐭𝐢𝐦𝐞. 𝐈 𝐰𝐚𝐬 𝐚𝐧 𝐚𝐫𝐭𝐢𝐥𝐥𝐞𝐫𝐲𝐦𝐚𝐧.

𝐈 𝐝𝐞𝐩𝐥𝐨𝐲𝐞𝐝 𝐢𝐧 𝐬𝐮𝐩𝐩𝐨𝐫𝐭 𝐨𝐟 𝐎𝐩𝐞𝐫𝐚𝐭𝐢𝐨𝐧 𝐄𝐧𝐝𝐮𝐫𝐢𝐧𝐠 𝐅𝐫𝐞𝐞𝐝𝐨𝐦.

𝐌𝐲 𝐛𝐚𝐭𝐭𝐚𝐥𝐢𝐨𝐧 𝐩𝐫𝐨𝐯𝐢𝐝𝐞𝐝 𝐛𝐚𝐬𝐞 𝐬𝐞𝐜𝐮𝐫𝐢𝐭𝐲 𝐭𝐡𝐫𝐨𝐮𝐠𝐡𝐨𝐮𝐭 𝐭𝐡𝐞 𝐄𝐮𝐫𝐨𝐩𝐞𝐚𝐧 𝐭𝐡𝐞𝐚𝐭𝐞𝐫 𝐟𝐫𝐨𝐦 𝐓𝐮𝐫𝐤𝐞𝐲 𝐭𝐨 𝐄𝐧𝐠𝐥𝐚𝐧𝐝 𝐢𝐧 𝐭𝐡𝐞 𝐞𝐚𝐫𝐥𝐲 𝐬𝐭𝐚𝐠𝐞𝐬 𝐨𝐟 𝐭𝐡𝐞 𝐰𝐚𝐫 𝐢𝐧 𝐀𝐟𝐠𝐡𝐚𝐧𝐢𝐬𝐭𝐚𝐧.”