Hi Bob, and welcome to G2G. I think the link is to your own profile? Do you have profiles, or dates and places, for the Jacobus brothers in your question?
This looks like them, Louisville, 1920:
"United States Census, 1920," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MHGW-75Z : accessed 30 July 2018), Samuel Jacobus in household of Robert A Jacobus, Louisville Ward 11, Jefferson, Kentucky, United States; citing ED 194, sheet 13B, line 98, family 282, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 581; FHL microfilm 1,820,581.
Possibly Samuel T, enlisting in Phoenix, 1943:
"United States World War II Army Enlistment Records, 1938-1946," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:K85C-7MB : 5 December 2014), Samuel T Jacobus, enlisted 09 Apr 1943, Phoenix, Arizona, United States; citing "Electronic Army Serial Number Merged File, ca. 1938-1946," database, The National Archives: Access to Archival Databases (AAD) (http://aad.archives.gov : National Archives and Records Administration, 2002); NARA NAID 1263923, National Archives at College Park, Maryland.
Living in Phoenix, 1940, with mother Sophia, brother Martin, wife Viola, and daughter probably still living:
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:VYWR-M9W : accessed 30 July 2018), Samuel T Jacobus, Phoenix, Supervisorial District 3, Maricopa, Arizona, United States; citing enumeration district (ED) 7-46, sheet 4B, line 74, family 102, Sixteenth Census of the United States, 1940, NARA digital publication T627. Records of the Bureau of the Census, 1790 - 2007, RG 29. Washington, D.C.: National Archives and Records Administration, 2012, roll 105.
Maybe you already have this info. Do you have more specific questions?