Complex sentence: Since, 2005 the company has also provided a similar service, MotoMail, to the US Marine Corps and in 2009 began serving the US Army with "Hooahmail".
Split into simpler sentences: Since, 2005 the company has also provided a similar service, MotoMail, to the US Marine Corps. At the peak Motomail was delivering 75,000 letters a month into Iraq.In 2009 began serving the US Army with "Hooahmail".