Not true. They have an army, navy and air force, known collectively as the Bundeswehr.
The military part of the federal defense force consists of Army (Heer), Navy (Marine), Air Force (Luftwaffe), Joint Support Service (Streitkräftebasis), and Central Medical Services (Zentraler Sanitätsdienst) branches.
The Bundeswehr has 200,500 professional soldiers, 55,000 18-25 year-old conscripts who serve for at least nine months under current rules, and 2,500 active reservists at any given time.
The number of civilian employees is to be reduced to 75,000 during the coming years. Roughly 300,000 reservists are available to the Armed Forces and participate in defense exercises as well as abroad deployments.
Wiki.