Dear Mr. Wagner,
Thank you for posting your request on History Hub!
We searched the World War II Operations Reports, 1940-1948 in the Records of the Adjutant General's Office, 1917-1981 (Record Group 407) and located Battalion Histories for 11 Apr 1943 - 7 Nov 1944 of the 561st Anti-Aircraft Artillery (AW) Battalion (Mobile). For access to and/or copies of these records, please contact the National Archives at College Park - Textual Reference (RDT2) via email at email@example.com.
We hope this is helpful. Best of luck with your research!