Join our newsletter to get the latest military space news every Tuesday by veteran defense journalist Sandra Erwin. WASHINGTON — Rocket Lab is aiming to chip away at SpaceX’s dominance in military space launch, confirming its bid to compete for Pentagon contracts with its new medium-lift rocket Neutron. “We’re excited to bid this time round for NSSL Lane 1, and we think Neutron is a really good vehicle for it,” Rocket Lab’s founder and CEO Peter Beck told SpaceNews. The U.S. Space Force last week released a request for proposals…