Complex sentence: Pentagon Federal is not the only financial services company that specializes in serving the military--the credit union competes with other military credit unions, like Navy Federal Credit Union, as well as with some large banks including Bank of America-Military Bank and USAA.
Split into simpler sentences: Pentagon Federal is not the only financial services company that specializes in serving the military. The credit union competes with other military credit unions, like Navy Federal Credit Union, as well as with some large banks including Bank of America-Military Bank and USAA.