Complex sentence: In June, Truman ordered the transfer of 90 sets of non-nuclear Mark 4 components to the AFSWP for training purposes, and in December, he authorized the carriage of non-nuclear components on board the "Midway"-class carriers.
Split into simpler sentences: In June, Truman ordered the transfer of 90 sets of non-nuclear Mark 4 components to the AFSWP for training purposes. In December, he authorized the carriage of non-nuclear components on board the "Midway"-class carriers.