Despite the negative connotations of the swastika, the Nazi monopoly on the symbol has only existed since World War II. Before then, many groups adopted it as a symbol. One of these groups was the 45th Infantry Division of the United States Army. As you would imagine, they have since changed the insignia. Its most recent incarnation is a thunderbird.
In August of 1924, the 45th Infantry Division adopted the swastika as their shoulder patch insignia. It was a symbol they picked up from the local Native American tribes and was meant to be respectful to them. The swastika they chose is bright yellow inside a red square with the points up, down, left and right rather than at the corners. The colors are very typical of the southwest.
The 45th Infantry Division changed their insignia to a thunderbird in 1939, as Germany was making many enemies among countries that the United States would soon align with. The thunderbird that they picked up as their new insignia was also taken from local natives, so they were able to keep at least that purpose. Two years later, they were made regular army for a limited time in preparation for war. They had to undergo extensive training to become battle ready and were not shipped out until June 8, 1943.
The unit was kept busy during their time overseas and, having apparently lost deference for the swastika, was allegedly involved in two massacres of German soldiers. The 45th I.D. also fought in the Korean War. The division is currently inactive.