If adopted, the proposal would mark a significant increase not just in the number of Ukrainians the US trains but also in the type of training they receive.Under the new program, the US would begin training much larger groups of Ukrainian soldiers in more sophisticated battlefield tactics, including how to coordinate infantry maneuvers with artillery support – “much more intense and comprehensive” training than Ukraine has been receiving in Poland or the UK, according to one source briefed on the proposal.A senior Biden administration official declined to comment on the specifics of the planning, telling CNN that “we won’t get ahead of decisions that haven’t been made, but we are constantly looking for ways to make sure the Ukrainians have the skills they need to succeed on the battlefield as Ukraine defends their territory from Russian aggression.”A grinding war of attritionHow decisive so-called “combined arms training” is likely to be on the battlefield remains an open question because the conflict has primarily been fought as a grinding war of attrition between two artillery armies, said Mike Kofman, an expert on the Russian and Ukrainian militaries at the Center for Naval Analyses.The US is currently looking at how best to scale this operation up from the current efforts, another official said, since it will require a larger and more diverse group of trainers.But the UK’s program focused on providing basic training to new soldiers with little to no combat experience."