The Pentagon is preparing detailed analysis and working out how to support Ukraine's military in the medium and long term, including after the war with Russia has ended, according to three defense officials. The efforts are being led by Chairman of the Joint Chiefs of Staff Gen. Mark Milley and would build on the billions of dollars in military aid the US has given to Ukraine since Russia invaded in February. The process is at an early stage and a senior defense official said it is looking at the "future of Ukrainian forces," aiming to answer key questions about "what...