Recent advances in chiral effective field theory (chiral EFT) have significantly improved the understanding of nuclear forces and their applications in nuclear many-body systems. Chiral EFT is a framework derived from quantum chromodynamics (QCD) that allows for the systematic calculation of nuclear forces based on symmetry principles. This approach has enabled the derivation of two-nucleon (NN) interactions up to sixth order and three-nucleon forces (3NFs) up to fifth order. These forces are essential for describing nuclear structure and properties of neutron-rich systems, including neutron skins and astrophysical systems. Chiral EFT provides a consistent framework for calculating nuclear forces by expanding in terms of small momenta and chiral symmetry breaking scales. This expansion allows for the systematic inclusion of higher-order terms, which are crucial for accurately describing nuclear interactions. The chiral EFT approach not only generates NN forces but also many-nucleon forces on an equal footing, enabling a more comprehensive description of nuclear systems. The application of chiral EFT to nuclear many-body systems has led to significant progress in understanding the behavior of light nuclei and medium-mass nuclei. While ab initio calculations for light nuclei are generally successful, challenges remain in describing medium-mass nuclei due to the complexity of nuclear interactions. Chiral EFT has also been used to construct equations of state for symmetric and neutron-rich nuclear matter, with a focus on the symmetry energy and its impact on neutron skins and astrophysical systems. The symmetry energy, which governs the density dependence of nuclear forces, plays a crucial role in determining the properties of neutron-rich systems, from nuclei to compact stars. Chiral EFT has been used to predict the symmetry energy and its effects on neutron skins, providing insights into the behavior of neutron-rich systems. These predictions have been compared with empirical data, particularly from parity-violating electron scattering experiments, to validate the accuracy of chiral EFT. The inclusion of the Δ(1232) isobar in chiral EFT has further improved the description of nuclear forces, particularly in the context of two-nucleon forces and three-nucleon forces. The Δ isobar contributes to the intermediate-range attraction in nuclear forces and is essential for accurately describing the behavior of nuclear systems. In summary, chiral EFT has become a powerful tool for deriving nuclear forces from first principles and has enabled significant advances in understanding nuclear many-body systems. The application of chiral EFT to nuclear physics has provided new insights into the behavior of nuclear forces, neutron-rich systems, and astrophysical systems, demonstrating the importance of this approach in modern nuclear physics.Recent advances in chiral effective field theory (chiral EFT) have significantly improved the understanding of nuclear forces and their applications in nuclear many-body systems. Chiral EFT is a framework derived from quantum chromodynamics (QCD) that allows for the systematic calculation of nuclear forces based on symmetry principles. This approach has enabled the derivation of two-nucleon (NN) interactions up to sixth order and three-nucleon forces (3NFs) up to fifth order. These forces are essential for describing nuclear structure and properties of neutron-rich systems, including neutron skins and astrophysical systems. Chiral EFT provides a consistent framework for calculating nuclear forces by expanding in terms of small momenta and chiral symmetry breaking scales. This expansion allows for the systematic inclusion of higher-order terms, which are crucial for accurately describing nuclear interactions. The chiral EFT approach not only generates NN forces but also many-nucleon forces on an equal footing, enabling a more comprehensive description of nuclear systems. The application of chiral EFT to nuclear many-body systems has led to significant progress in understanding the behavior of light nuclei and medium-mass nuclei. While ab initio calculations for light nuclei are generally successful, challenges remain in describing medium-mass nuclei due to the complexity of nuclear interactions. Chiral EFT has also been used to construct equations of state for symmetric and neutron-rich nuclear matter, with a focus on the symmetry energy and its impact on neutron skins and astrophysical systems. The symmetry energy, which governs the density dependence of nuclear forces, plays a crucial role in determining the properties of neutron-rich systems, from nuclei to compact stars. Chiral EFT has been used to predict the symmetry energy and its effects on neutron skins, providing insights into the behavior of neutron-rich systems. These predictions have been compared with empirical data, particularly from parity-violating electron scattering experiments, to validate the accuracy of chiral EFT. The inclusion of the Δ(1232) isobar in chiral EFT has further improved the description of nuclear forces, particularly in the context of two-nucleon forces and three-nucleon forces. The Δ isobar contributes to the intermediate-range attraction in nuclear forces and is essential for accurately describing the behavior of nuclear systems. In summary, chiral EFT has become a powerful tool for deriving nuclear forces from first principles and has enabled significant advances in understanding nuclear many-body systems. The application of chiral EFT to nuclear physics has provided new insights into the behavior of nuclear forces, neutron-rich systems, and astrophysical systems, demonstrating the importance of this approach in modern nuclear physics.