SS Fortress Regiment 1

{{Short description|Improvised unit of the Waffen-SS}}

{{refimprove|date=July 2013}}

{{Infobox military unit

| unit_name = SS Fortress Regiment 1

| abbreviation =

| image =

| caption =

| dates = 1945

| country = {{flag|Nazi Germany}}

| branch = 23px Waffen-SS

| type =

| role =

| size = Regiment

| command_structure =

| Past Commanders =

| ceremonial_chief =

| colonel_of_the_regiment =

| notable_commanders = Georg-Robert Besslein

| identification_symbol =

| identification_symbol_2 =

| nickname =

| patron =

| motto =

| colors =

| march =

| mascot =

| battles = World War II

• Siege of Breslau

| anniversaries =

| decorations =

| battle_honours =

}}

SS Fortress Regiment 1 ({{langx|de|SS-Festungs-Regiment 1}}) was an improvised unit of the Waffen SS formed in February 1945, during World War II, for service in the defence of the German city of Breslau, during the Red Army's Siege of Breslau. The regiment engaged in savage house to house fighting against the invading Red Army that lasted 82 days but surrendered at the end of the siege on 6 May 1945.