Complex sentence: Although this problem was studied in depth, it appeared there was no obvious solution, and the Army eventually gave up on Loki in September 1955, in favour of the Nike-Ajax missile, which had recently reached operational status.
Split into simpler sentences: Although this problem was studied in depth, it appeared there was no obvious solution. The Army eventually gave up on Loki in September 1955, in favour of the Nike-Ajax missile, which had recently reached operational status.