What is the function of the DFAS in relation to DTS?

The Defense Finance and Accounting Service (DFAS) plays a crucial role in the financial aspect of travel for military and civilian personnel through the Defense Travel System (DTS). Specifically, the primary function of DFAS in this context is to reimburse travelers and the Government Charge Card Vendor after travel has been completed. This reimbursement process is essential as it ensures that finances are accurately managed and that all expenditures made during travel are settled in a timely manner. By managing these reimbursements, DFAS helps maintain financial accountability and supports the overall efficiency of travel management within the Department of Defense.

The other functions listed in the options, such as issuing travel orders or providing training, while important, are not the main responsibilities of DFAS within the DTS framework. Instead, those tasks may be managed by other designated agencies or departments responsible for travel planning and coordination.